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小数混合运算专项练习 276 题(有答案)
(1) 0.11×1.8+8.2×0.11 (16) 5.4×[(1.3+2.15)÷0.2]
(2) 2.34×99+2.34 (17) 8.4÷0.6+8.4÷0.4
(3) 5.4÷2.7×0.8 (18) 16.8×10.1
(4) 132×101 (19) 10.9﹣0.9÷0.2+1.8
(5) 6.25÷1.25÷0.8 (20) 1.25×3.2×0.25.
(6) 2.5×16. (21) 1.36+4.85+2.64+6.15
(7) 6.33×101﹣6.33 (22) 98.5÷2.5÷4
(8) 1.56×1.7+0.44×1.7 (23) 5.4÷[2.5×(3.7﹣2.9)]
(9) 1.8×[(3.41﹣2.9)÷0.03] (24) 0.8×(4﹣3.68)÷0.01
(10) 0.125×32×2.5. (25) 83.7﹣12.83﹣0.17
(11) 1.258×18.5﹣0.258×18.5 (26) 5.96+13×(3.2﹣3.12)
(12) 8.48÷0.8×0.9 (27) 4.32÷2.4×1.7;
(13) 1.25×2.4 (28) 16.2×4.5+3.8×4.5;
(14) 5.85÷(1.3+0.5)×6. (29) 9.05﹣3.86﹣3.14;
(15) 17.17﹣6.8﹣3.2﹣6.17 (30) 7.28+0.72÷0.9.
小数混合运算--- 1(31) 4.32+5.43+6.68 (46) 0.9+9.9+99.9+999.9.
(32) 17.17﹣6.8﹣3.2 (47) 2.9×99+2.9
(33) 5.29×9+5.29 (48) 25×11.2×4
(34) 16.8×10.1 (49) 23.25﹣6.75﹣3.25.
(35) 2.74×9.5+5×0.274 (50) 125×3.2×2.5
(36) 0.36+9.6÷3.2. (51) 3.6×10.1
(37) 3.75×25+6.25×25 (52) 5.8×2.7+0.58×73
(38) 25.46﹣8.23﹣1.76 (53) 3.6+6.4×1.8
(39) 2.9+7.1×10 (54) (1.48+3.02)÷(3.6×0.5)
(40) 1.25×32×0.25. (55) (36.7﹣4.9)×101﹣31.8.
(41) 15.68﹣(7.78﹣4.32)﹣2.32 (56) 6.33×101﹣6.33
(42) 0.25×3.2×1.25 (57) 35.6﹣5×1.73
(43) 9.99×1.01 (58) 1.6×55.4﹣55.4×0.6
(44) 4.63×1.4+46.3×0.86 (59) 17.68÷5.2+2.7×1.5.
(45) 17.5÷0.8÷12.5 (60) 1.08×0.8÷0.27
小数混合运算--- 2(61) 102×0.45 (76) 4.52+0.61+1.39+6.48
(62) 22.78÷1.25÷0.8 (77) 4.27﹣(1.96﹣1.73)
(63) 0.34×101﹣0.34. (78) (294.4﹣19.2×6)÷(6+8)
(64) 0.125×32×2.5 (79) 12.5×0.76×0.4×8×2.5.
(65) 0.8×6.3﹣0.8×3.8 (80) 4.98+8.02×2.5
(66) 504÷3.2×2.08 (81) 60.8﹣40.8÷2.5
(67) (20﹣0.8×9)×5.7 (82) 0.8×69.6×12.5
(68) 2.4×1.5+3.6÷1.5 (83) 4.98×99+4.9
(69) 7.38﹣5.14+3.62﹣2.86 (84) 6.48÷3.2÷2.5
(70) 0.12×1.8+8.2×0.12 (85) 1.2×7.6+7.6×6.8.
(71) 5.4÷[0.51÷(1.2﹣1.03)] (86) (9.4﹣5.8)×2.07
(72) [(8.1﹣5.6)×0.9﹣1.05]÷0.04. (87) 12.54﹣4.56﹣3.44﹣1.54
(73) 10.8﹣0.8÷(0.35+0.05) (88) (9.36×5+9.36+9.36×2)×1.25
(74) 8×[1÷(2.3﹣2.25)] (89) 7.236÷0.18﹣14.3×0.02.
(75) 2.64×9.9+0.264 (90) 9.6÷0.4×0.25
(91) 29.7÷(5.85÷0.65)
小数混合运算--- 3(92) 7.4×9.9 (108) 0.4×270×2.
(93) 3.84﹣2.7×0.64 (109) (40+1.25)×8
(94) 8.68﹣8.68÷0.56×0.5 (110) (12.5﹣0.05)×8
(95) 4.7×4.7+4.7+4.3×4.7. (111) 2.6×8.5+8.5×7.4
(96) 2.72÷[(8.2﹣6.5)×0.5]; (112) 9.9×6.9﹣6.9×3.9
(97) 9.12+9.12×9﹣60.2; (113) 5.6×99+5.6
(98) 28.4÷0.4÷0.25;
(114) 2.5×(1.9+1.9+1.9+1.9)
(99) 27.36﹣27.36÷7.6.
(115) 7.2÷1.25÷8.
(100) 3.25×0.45+6.75×0.45
(116) 52.4﹣(15+0.6)÷1.6
(101) 31.5﹣24.5÷3.5
(117) 9.87×99+9.87
(102) 7.5×102
(118) 46.8÷0.9÷0.4
(103) 6.3+3.7×2.8.
(119) 5.5×17.3+6.7×5.5.
(104) 2.15+8.73+1.27+7.85
(120) 99×4.2+4.2
(105) 11.87﹣(8.2+1.87)
(121) 0.25×1.25×3.2
(106) 5.42﹣3.87﹣1.13
(122) 6.4×14+15×6.4+6.4
(107) 4.38﹣1.56+0.62﹣0.44
小数混合运算--- 4(123) (1.3+1.3×0.125×8)÷(80﹣77.4) (138) 0.26+15.68+9.74+2.32
(124) 4×(25+2.5+0.25)÷111 (139) 13.26+9.55﹣3.26
(125) 6.25÷〔(17.2﹣3.6×4.5)÷0.32〕 (140) 6.1+3.9﹣6.1+3.9.
(126) 28.4×99+28.4 (141) 31.7÷0.63(保留2位小数)
(127) 0.94×2.5﹣0.45 (142) 2.4×1.5+3.6÷1.5
(143) 0.32×0.25+0.08÷4
(128) 4×0.8×12.5×2.5
(144) (9.6+1.48÷3.7)÷8
(129) 17.5÷0.25×17+13.
(145) 5.8÷[4×(1.34﹣0.14)]
(130) 10.1×87
(146) 5.4÷[0.51÷(1.2﹣1.03)].
(131) 2.3+3.19÷(22﹣19.8)
(147) 21.35﹣3.25﹣16.75
(132) 1.25×7.2.
(148) 33.02﹣(148.4﹣90.85)÷2.5
(133) 9.1﹣1.2÷6﹣6.24
(149) 32×2.5×0.125
(134) 7.3+12.8﹣3.8×2.3
(150) 18.1+(3﹣0.299÷0.23)×1.
(135) (5.36+7.64)÷13×100
(151) 67﹣(2.98+0.67)
(136) 7.575÷[(5.63﹣1.88)×0.2].
(152) 8×16﹣73.8×6
(137) 7.5﹣(5.5+1.24)
(153) (45+14)÷73+710.
小数混合运算--- 5(154) 13.7×0.125×8 (170) 91÷2.6÷0.05=
(155) 0.8×[13﹣(3.12+5.28)] (171) 6.3×3.7+6.3×6.3=
(156) 102×0.56 (172) (3.7+1.7×0.4)÷2.5=
(157) 1.53×1.7+0.47×1.7. (173) 7.28+3.2÷2.5=
(158) 5.18+0.73+0.82 (174) 0.74+0.9×7.4=
(159) 0.75×1.8÷1.5 (175) 7.8÷0.125÷0.8=
(160) 12.5×7.1×0.8 (176) 37.5÷[0.3×(1.34﹣0.84)]
(161) 6.12×99+6.12 (177) (2.5+27.75÷1.5)×1.6.
(162) 8.6÷0.86+8×0.35 (178) 6.21﹣3.8+2.2
(163) 5.6×(18.5﹣8.5÷0.5) (179) 6.03+3.7+2.97
(164) 0.125×4.78×80
(180) 17.43﹣6.57﹣2.43
(165) 2.8×3.6+1.4×2.8
(181) 20.47﹣(1.47+6.8)
(166) (0.4+40)×2.5
(182) 13.26+4.71+3.47+5.29
(167) 78.7﹣17.7×3.6
(183) 22.74+8.68﹣13.74.
(168) 18÷[0.3×(8﹣6.5)]
(184) 10÷0.2÷2.5
(169) 12.7+12.5+0.5.
(185) 64×4.5+3.6×45
小数混合运算--- 6(186) 1.25×3.2×0.8 (201) 0.25×3.85×40
(187) 14.5×102 (202) 1.46×3.5+3.5×4.54.
(203) 7×12.5×0.8
(188) 14.64+3.7×2.8
(204) 4.7×3.6+4.7×6.4
(189) 8.4÷0.21÷0.5.
(205) 1.45×[(2.8+4.4)÷2.4].
(190) 0.125×9×8×0.3 (206) 4.2×(6.18﹣3.03)+6.3
(207) 15.02﹣6.8﹣(1.02+1.2 )
(191) 4.62÷5÷0.66
(208) 0.6×[(5﹣0.68)÷1.2]
(192) 5.78×2.3+5.78+5.78×6.7
(209) 2.7÷4+6.3×0.25
(193) 7.75×[20÷(3.24﹣3.04)].
(210) (6.02+2.8 )÷0.4﹣2.05
(194) 1.25×0.5×8×0.2
(211) 3.08×3.5+6.2×3.08+3.08×0.3.
(195) 0.97×9+0.97
(212) 2.3+3.91÷(22﹣19.7)
(196) 5.4÷[3×﹙3.8﹣2.9﹚].
(213) 21.6÷[64.8﹣(48.6﹣2.7×2)].
(197) 0.4×(3.2﹣0.8)÷0.15
(214) 93.6×3.6+1.4×3.6
(198) 5.7+1.9×0.2÷7.6
(215) 0.25×0.8×0.125×0.4
(199) 32.4×6.3+32.4×3.7
(216) 2.7×1.5﹣2.7
(200) 18.2﹣10.6×(0.9﹣0.75)
小数混合运算--- 7(217) 9.08+5.45+11.92+4.55 (233) 17.68÷5.2+2.7×1.5
(218) 1.25×30×1.2×0.8. (234) 35.6﹣5×1.73
(219) 0.6+0.94﹣0.208
(235) (1.1﹣0.78)×(2.7﹣1.95)
(220) 4.85×1.25×8
(236) 1.3×0.75×4
(221) (64﹣22.4÷1.4)×1.2 (237) 1.08÷1.8×1.2
(222) 18.3﹣6.25﹣3.75 (238) 50.4×1.9﹣1.8
(223) 2.8×3.6+1.4×2.8 (239) 0.82×0.25+1.18×0.25.
(240) 8.5×([ 2.36+2.42)÷0.25]
(224) 6.6÷〔14.5﹣(1.7+1.8)〕
(241) 3.9÷([ 1.3+0.6)×6﹣3.6]
(225) 0.25×9.87×4
(226) 36.7×2.1+10.8 (242) 4.25×6.3+3.7×4.25
(227) 8.45﹣0.45×0.1 (243) 205×0.99
(228) 0.73×102 (244) 25.6﹣7.49﹣2.51
(229) 7.8×5.6+2.3×4.4
(245) [2.5﹣(6.8﹣4.9)]×0.8.
(230) 76.3×27﹣76.3×17.
(246) 102×4.5
(231) 7.05×23.7+7.05×76.3.
(247) 3.4÷([ 1.2+0.5)×5]
(232) [(7.6﹣5.2)÷0.4+2.54]×32.
(248) 8×(20﹣1.25)
小数混合运算--- 8(249) 0.654+10.9×6.5 (263) 13.25﹣0.8+1.75﹣1.2;
(250) 22.7×1.25×0.8 (264) 2.5×99+2.5;
(265) 10.36+4.8﹣16.5÷5;
(251) 3.91×2.8+6.09×2.8.
(266) 12.5×2.4.
(252) 6.23+3.09=
(267) 38.78﹣19.59+41.22﹣30.41
(253) 132.4﹣59.8=
(268) 2.74×4.86+4.86×6.26+4.86
(254) 6.62×0.84=
(269) 0.08×(12.5+2.5)×0.1
(255) 2.07÷0.023=
(270) 25.92+(10.1﹣14.5×0.2)
(256) [20.026﹣(8.6+9.7)×0.92]÷30.19.
(271) 0.487×12.5÷48.7
(257) 0.125×32×2.5
(272) (8.16+2.09)÷[(10.3﹣9.3)÷0.4].
(258) 0.8×6.3﹣0.8×3.8
(273) 1.56×1.7+0.44×1.7
(259) 50.4÷3.2×2.08
(274) 12.5×(7.2﹣1.9)×0.8
(260) 204÷(3.4×0.5)
(275) 0.25×2010+20.10×75
(261) (43.26+2.34)÷7.5
(276) 30.8÷[(6.34﹣4.59)×4].
(262) (20﹣0.8×9)×5.7.
小数混合运算--- 9参考答案:
=(0.125×8)×(4×2.5),
(1)0.11×1.8+8.2×0.11, =1×10,
=0.11×(1.8+8.2), =10
=0.11×10, (11)1.258×18.5﹣0.258×18.5,
=1.1; =18.5×(1.258﹣0.258),
(2)2.34×99+2.34, =18.5×1,
=2.34×(99+1), =18.5;
=2.34×100, (12)8.48÷0.8×0.9,
=234; =10.6×0.9,
(3)5.4÷2.7×0.8, =9.54;
=2×0.8, (13)1.25×2.4,
=1.6; =1.25×8×0.3,
(4)132×101, =10×0.3,
=132×(100+1), =3;
=132×100+132, (14)5.85÷(1.3+0.5)×6,
=13332; =5.85÷1.8×6,
(5)6.25÷1.25÷0.8, =3.25×6,
=6.25÷(1.25×0.8), =19.5
=6.25÷1, (15)17.17﹣6.8﹣3.2﹣6.17
=6.25; =(17.17﹣6.17)﹣(6.8+3.2),
(6)2.5×16, =11﹣10,
=(2.5×4)×4, =1;
=40 (16)5.4×[(1.3+2.15)÷0.2]
(7)6.33×101﹣6.33, =5.4×[3.45÷0.2],
=6.33×(101﹣1), =5.4×17.25,
=6.33×100, =93.15;
=633; (17)8.4÷0.6+8.4÷0.4
(8)1.56×1.7+0.44×1.7, =14+21
=1.7×(1.56+0.44), =35;
=1.7×2, (18)16.8×10.1
=3.4; =16.8×10+16.8×0.1,
(9)1.8×[(3.41﹣2.9)÷0.03], =168+1.68,
=1.8×[0.51÷0.03], =169.68;
=1.8×17, (19)10.9﹣0.9÷0.2+1.8
=30.6; =10.9﹣4.5+1.8,
(10)0.125×32×2.5, =8.2;
小数混合运算--- 10(20)1.25×3.2×0.25 =7.17;
=(1.25×0.8)×(4×0.25), (33)5.29×9+5.29,
=1×1, =5.29×(9+1),
=1 =5.29×10,
(21)1.36+4.85+2.64+6.15, =52.9;
=(1.36+2.64)+(4.85+6.15), (34)16.8×10.1,
=4+11, =16.8×10+16.8×0.1,
=15; =168+1.68,
(22)98.5÷2.5÷4, =169.68;
=98.5÷(2.5×4), (35)2.74×9.5+5×0.274,
=98.5÷10, =2.74×9.5+0.5×2.74,
=9.85; =2.74×(9.5+0.5),
(23)5.4÷[2.5×(3.7﹣2.9)], =2.74×10,
=5.4÷[2.5×0.8], =27.4;
=5.4÷2, (36)0.36+9.6÷3.2,
=2.7; =0.36+3,
(24)0.8×(4﹣3.68)÷0.01, =3.36
=0.8×0.32÷0.01, (37)3.75×25+6.25×25,
=0.256÷0.01, =25×(3.75+6.25),
=25.6; =25×10,
(25)83.7﹣12.83﹣0.17, =250;
=83.7﹣(12.83+0.17), (38)25.46﹣8.23﹣1.76,
=83.7﹣13, =25.46﹣(8.23+1.76),
=70.7; =25.46﹣9.99
(26)5.96+13×(3.2﹣3.12), =15.45;
=5.96+13×0.08, (39)2.9+7.1×10,
=5.96+1.04, =2.9+71,
=7. =73.9;
(27)4.32÷2.4×1.7, (40)1.25×32×0.25
=1.8×1.7, =(1.25×8)×(4×0.25),
=3.06; =10×1,
(28)16.2×4.5+3.8×4.5, =1.
=(16.2+3.8)×4.5, (41)15.68﹣(7.78﹣4.32)﹣2.32,
=20×4.5, =15.68﹣7.78+4.32﹣2.32,
=90; =(15.68+4.32)﹣(7.78+2.32),
(29)9.05﹣3.86﹣3.14, =20﹣10,
=9.05﹣(3.86+3.14), =10;
=9.05﹣7, (42)0.25×3.2×1.25,
=2.05; =0.25×4×0.8×1.25,
(30)7.28+0.72÷0.9, =(0.25×4)×(0.8×1.25),
=7.28+0.8, =1×1,
=8.08 =1;
(31)4.32+5.43+6.68, (43)9.99×1.01,
=4.32+6.68+5.43, =(10﹣0.01)×1.01,
=11+5.43, =10.1﹣0.0101,
=16.43; =10.0899;
(32)17.17﹣6.8﹣3.2, (44)4.63×1.4+46.3×0.86,
=17.17﹣(6.8+3.2), =46.3×0.14+46.3×0.86,
=17.17﹣10, =46.3×(0.14+0.86),
小数混合运算--- 11=46.3×1, (56)6.33×101﹣6.33
=46.3; =6.33×(101﹣1),
(45)17.5÷0.8÷12.5, =6.33×100,
=17.5÷(0.8×12.5), =633;
=17.5÷1, (57)35.6﹣5×1.73,
=17.5; =35.6﹣8.65,
(46)0.9+9.9+99.9+999.9, =26.95;
=1﹣0.1+10﹣0.1+100﹣0.1+1000﹣0.1, (58)1.6×55.4﹣55.4×0.6,
=(1+10+100+1000)﹣(0.1+0.1+0.1+0.1), =55.4×(1.6﹣0.6),
=1111﹣0.4, =55.4×1,
=1110.6 =55.4;
(47)2.9×99+2.9 (59)17.68÷5.2+2.7×1.5,
=(99+1)×2.9, =3.4+4.05,
=100×2.9, =7.45
=290; (60)1.08×0.8÷0.27
(48)25×11.2×4 =1.08÷0.27×0.8,
=25×4×11.2, =4×0.8,
=100×11.2, =3.2;
=1120; (61)102×0.45
(49)23.25﹣6.75﹣3.25 =(100+2)×0.45,
=23.25﹣(6.75+3.25), =100×0.45+2×0.45,
=23.25﹣10, =45+0.9,
=13.25 =45.9;
(50)125×3.2×2.5, (62)22.78÷1.25÷0.8
=125×8×0.4×2.5, =22.78÷(1.25×0.8),
=(125×8)×(0.4×2.5), =22.78÷1,
=1000×1, =22.78;
=1000; (63)0.34×101﹣0.34
(51)3.6×10.1, =(101﹣1)×0.34,
=3.6×(10+0.1), =100×0.34,
=3.6×10+3.6×0.1, =34
=36+0.36, (64)0.125×32×2.5,
=36.36; =(0.125×8)×(4×2.5),
(52)5.8×2.7+0.58×73, =1×10,
=5.8×2.7+5.8×7.3, =10;
=5.8×(2.7+7.3), (65)0.8×6.3﹣0.8×3.8,
=5.8×10, =0.8×(6.3﹣3.8),
=58; =0.8×2.5,
(53)3.6+6.4×1.8, =2;
=3.6+11.52, (66)504÷3.2×2.08,
=15.12; =157.5×2.08,
(54)(1.48+3.02)÷(3.6×0.5), =327.6;
=4.5÷1.8, (67)(20﹣0.8×9)×5.7,
=2.5; =(20﹣7.2)×5.7,
(55)(36.7﹣4.9)×101﹣31.8, =12.8×5.7,
=31.8×101﹣31.8, =72.96
=31.8×(101﹣1), (68)2.4×1.5+3.6÷1.5,
=31.8×100, =3.6+2.4,
=3180 =6;
小数混合运算--- 12(69)7.38﹣5.14+3.62﹣2.86, (81)60.8﹣40.8÷2.5,
=(7.38+3.62)﹣(5.14+2.86), =60.8﹣16.32,
=11﹣8, =44.48;
=3; (82)0.8×69.6×12.5,
(70)0.12×1.8+8.2×0.12, =(0.8×12.5)×69.6,
=0.12×(1.8+8.2), =10×69.6,
=0.12×10, =696;
=1.2; (83)4.98×99+4.9,
(71)5.4÷[0.51÷(1.2﹣1.03)], =493.02+4.9,
=5.4÷[0.51÷0.17], =497.92;
=5.4÷3, (84)6.48÷3.2÷2.5,
=1.8; =6.48÷(3.2×2.5),
(72)[(8.1﹣5.6)×0.9﹣1.05]÷0.04, =6.48÷8,
=[2.5×0.9﹣1.05]÷0.04, =0.81;
=[2.25﹣1.05]÷0.04, (85)1.2×7.6+7.6×6.8,
=1.2÷0.04, =7.6×(1.2+6.8),
=30 =7.6×8,
(73)10.8﹣0.8÷(0.35+0.05), =60.8
=10.8﹣0.8÷0.4, (86)(9.4﹣5.8)×2.07,
=10.8﹣2, =3.6×2.07,
=8.8; =7.452;
(74)8×[1÷(2.3﹣2.25)], (87)12.54﹣4.56﹣3.44﹣1.54,
=8×[1÷0.05], =(12.54﹣1.54)﹣(4.56+3.44),
=8×20, =11﹣8,
=160; =3;
(75)2.64×9.9+0.264, (88)(9.36×5+9.36+9.36×2)×1.25,
=0.264×99+0.264, =9.36×(5+2+1)×1.25,
=0.264×(99+1), =9.36×8×1.25,
=0.264×100, =9.36×(8×1.25),
=26.4; =93.6;
(76)4.52+0.61+1.39+6.48 (89)7.236÷0.18﹣14.3×0.02,
=(4.52+6.48)+(0.61+1.39), =40.2﹣0.286,
=11+2, =39.914.
=13; (90)9.6÷0.4×0.25,
(77)4.27﹣(1.96﹣1.73) =24×0.25,
=4.27﹣0.23, =6;
=4.04; (91)29.7÷(5.85÷0.65),
(78)(294.4﹣19.2×6)÷(6+8) =29.7÷9,
=(294.4﹣115.2)÷14, =3.3;
=179.2÷14, (92)7.4×9.9,
=12.8; =7.4×(10﹣0.1),
(79)12.5×0.76×0.4×8×2.5 =7.4×10﹣7.4×0.1,
=(12.5×8)×(0.4×2.5)×0.76, =74﹣0.74,
=100×1×0.76, =73.26;
=76. (93)3.84﹣2.7×0.64,
(80)4.98+8.02×2.5, =3.84﹣1.728,
=4.98+20.25, =2.112;
=25.03; (94)8.68﹣8.68÷0.56×0.5,
小数混合运算--- 13=8.68﹣15.5×0.5, =5.42﹣5,
=8.68﹣7.75, =0.42;
=0.93; (107)4.38﹣1.56+0.62﹣0.44,
(95)4.7×4.7+4.7+4.3×4.7, =(4.38+0.62)﹣(1.56+0.44),
=4.7×(4.7+4.3+1), =5﹣2,
=4.7×10, =3;
=47 (108)0.4×270×2.5,
(96)2.72÷[(8.2﹣6.5)×0.5] =(0.4×2.5)×270,
=2.72÷[1.7×0.5], =270;
=2.72÷0.85, (109)(40+1.25)×8,
=3.2; =40×8+1.25×8,
(97)9.12+9.12×9﹣60.2 =320+10,
=(1+9)×9.12﹣60.2, =330;
=10×9.12﹣60.2, (110)(12.5﹣0.05)×8,
=91.2﹣60.2, =12.5×8﹣0.05×8,
=31; =100﹣0.4,
(98)28.4÷0.4÷0.25 =99.6;
=28.4÷(0.4×0.25), (111)2.6×8.5+8.5×7.4,
=28.4÷0.1, =(2.6+7.4)×8.5,
=284; =85;
(99)27.36﹣27.36÷7.6 (112)9.9×6.9﹣6.9×3.9,
=27.6﹣3.6, =(9.9﹣3.9)×6.9,
=24 =6×6.9,
=41.4;
(113)5.6×99+5.6,
(100)3.25×0.45+6.75×0.45, =5.6×(99+1),
=0.45×(3.25+6.75), =560;
=0.45×10, (114)2.5×(1.9+1.9+1.9+1.9),
=4.5; =2.5×4×1.9,
(101)31.5﹣24.5÷3.5, =10×1.9,
=31.5﹣7, =19;
=24.5; (115)7.2÷1.25÷8,
(102)7.5×102, =7.2÷8÷1.25,
=7.5×(100+2), =0.9÷1.25,
=7.5×100+7.5×2, =0.72.
=750+15, (116)52.4﹣(15+0.6)÷1.6,
=765; =52.4﹣15.6÷1.6,
(103)6.3+3.7×2.8, =52.4﹣9.75,
=6.3+10.36, =42.65;
=16.66. (117)9.87×99+9.87,
(104)2.15+8.73+1.27+7.85 =9.87×(99+1),
=(2.15+7.85)+(8.73+1.27), =987;
=10+10, (118)46.8÷0.9÷0.4,
=20; =46.8÷(0.9×0.4),
(105)11.87﹣(8.2+1.87), =46.8÷0.36,
=11.87﹣1.87﹣8.2, =130;
=10﹣8.2, (119)5.5×17.3+6.7×5.5,
=1.8; =5.5×(17.3+6.7),
(106)5.42﹣3.87﹣1.13, =5.5×24,
小数混合运算--- 14=132 =2.3+1.45,
(120)99×4.2+4.2 =3.75;
=4.2×(99+1), (132)1.25×7.2,
=4.2×100, =1.25×8×0.9,
=420; =10×0.9,
(121)0.25×1.25×3.2 =9
=0.25×1.25×(4×0.8), (133)9.1﹣1.2÷6﹣6.24
=0.25×4×(1.25×0.8), =9.1﹣0.2﹣6.24,
=1×1, =8.9﹣6.24,
=1; =2.66;
(122)6.4×14+15×6.4+6.4 (134)7.3+12.8﹣3.8×2.3
=6.4×(14+15+1), =20.1﹣8.74,
=6.4×30, =11.36;
=192; (135)(5.36+7.64)÷13×100
(123)(1.3+1.3×0.125×8)÷(80﹣77.4) =13÷13×100,
=(1.3+1.3×1)÷2.6, =100;
=2.6÷2.6, (136)7.575÷[(5.63﹣1.88)×0.2]
=1; =7.575÷[3.75×0.2],
(124)4×(25+2.5+0.25)÷111 =7.575÷0.75,
=(4×25+4×2.5+4×0.25)÷111, =10.1
=(100+10+1)÷111, (137)7.5﹣(5.5+1.24),
=111÷111, =7.5﹣5.5﹣1.24,
=1; =2﹣1.24,
(125)6.25÷[(17.2﹣3.6×4.5)÷0.32] =0.76;
=6.25÷[(17.2﹣16.2)÷0.32],
=6.25÷(1÷0.32), (138)0.26+15.68+9.74+2.32,
=6.25÷3.125, =(0.26+9.74)+(15.68+2.32),
=2 =10+18,
(126)28.4×99+28.4, =28;
=28.4×(99+1), (139)13.26+9.55﹣3.26,
=28.4×100, =13.26﹣3.26+9.55,
=2840. =10+9.55,
(127)0.94×2.5﹣0.45, =19.55;
=2.35﹣0.45, (140)6.1+3.9﹣6.1+3.9,
=1.9. =6.1﹣6.1+(3.9+3.9),
(128)4×0.8×12.5×2.5, =0+7.8,
=(4×2.5)×(0.8×12.5), =7.8
=10×10, (141)31.7÷0.63≈50.32;
=100. (142)2.4×1.5+3.6÷1.5
(129)17.5÷0.25×17+13, =3.6+2.4,
=70×17+13, =6;
=1190+13, (143)0.32×0.25+0.08÷4
=1203 =0.08+0.08÷4,
(130)10.1×87, =0.08+0.02,
=(10+0.1)×87, =0.08+0.02,
=87+8.7, =0.1;
=95.7; (144)(9.6+1.48÷3.7)÷8
(131)2.3+3.19÷(22﹣19.8), =(9.6+0.4)÷8,
=2.3+3.19÷2.2, =10÷8,
小数混合运算--- 15=1.25; =100×0.56+2×0.56,
(145)5.8÷[4×(1.34﹣0.14)] =56+1.12,
=5.8÷[4×1.2], =57.12;
=5.8÷4.8, (157)1.53×1.7+0.47×1.7,
≈1.21; =(1.53+0.47)×1.7,
(146)5.4÷[0.51÷(1.2﹣1.03)] =2×1.7,
=5.4÷[0.51÷0.17], =3.4
=5.4÷3, (158)5.18+0.73+0.82,.
=1.8 =(5.18+0.82)+0.73,
(147)21.35﹣3.25﹣16.75, =6+0.73,
=21.35﹣(3.25+16.75), =6.73;
=21.35﹣20, (159)0.75×1.8÷1.5,
=1.35; =1.35÷1.5,
(148)33.02﹣(148.4﹣90.85)÷2.5, =0.9;
=33.02﹣57.55÷2.5, (160)12.5×7.1×0.8,
=33.02﹣23.02, =(12.5×0.8)×7.1,
=10; =10×7.1,
(149)32×2.5×0.125, =71;
=4×8×2.5×0.125, (160)6.12×99+6.12,
=(4×2.5)×(8×0.125), =6.12×(99+1),
=10×1, =6.12×100,
=10; =612;
(150)18.1+(3﹣0.299÷0.23)×1, (162)8.6÷0.86+8×0.35,
=18.1+(3﹣1.3)×1, =10+2.8,
=18.1+1.7×1, =12.8;
=18.1+1.7, (163)5.6×(18.5﹣8.5÷0.5),
=19.8 =5.6×(18.5﹣17),
(151)67﹣(2.98+0.67), =5.6×1.5,
=67﹣3.65, =8.4
=63.35; (164)0.125×4.78×80,
(152)8×16﹣73.8×6, =0.125×4.78×8×10,
=128+442.8, =(0.125×8)×(4.78×10),
=570.8; =1×47.8,
(153)(45+14)÷73+710, =47.8;
=59÷73+710, (165)2.8×3.6+1.4×2.8,
=2.8×(3.6+1.4),
= +710,
=2.8×5,
=14;
=710
(166)(0.4+40)×2.5,
(154)13.7×0.125×8, =0.4×2.5+40×2.5,
=13.7×(0.125×8), =1+100,
=13.7×1, =101;
=13.7; (167)78.7﹣17.7×3.6,
(155)0.8×[13﹣(3.12+5.28)], =78.7﹣63.72,
=0.8×[13﹣8.4], =14.98;
=0.8×4.6, (168)18÷[0.3×(8﹣6.5)],
=3.68; =18÷[0.3×1.5],
(156)102×0.56, =18÷0.45,
=(100+2)×0.56, =40;
小数混合运算--- 16=12.2;
(169)12.7+12.5+0.5, (182)13.26+4.71+3.47+5.29,
=12.7+(12.5+0.5), =(13.26+3.47)+(4.71+5.29),
=12.7+13, =16.73+10,
=25.7 =26.73;
(170)91÷2.6÷0.05, (183)22.74+8.68﹣13.74,
=35÷0.05, =(22.74﹣13.74)+8.68,
=700; =9+8.68,
(171)6.3×3.7+6.3×6.3, =17.68
=6.3×(3.7+6.3), (184)10÷0.2÷2.5,
=6.3×10, =10÷(0.2×2.5),
=63; =10÷0.5,
(172)(3.7+1.7×0.4)÷2.5, =20;
=(3.7+0.68)÷2.5, (185)64×4.5+3.6×45,
=4.38÷2.5, =6.4×45+3.6×45,
=1.752; =(6.4+3.6)×45,
(173)7.28+3.2÷2.5, =10×45,
=7.28+1.28, =450;
=8.56; (186)1.25×3.2×0.8,
(174)0.74+0.9×7.4, =(1.25×0.8)×3.2,
=(1+9)×0.74, =1×3.2,
=10×0.74, =3.2;
=7.4; (187)14.5×102,
(175)7.8÷0.125÷0.8, =14.5×(100+2),
=7.8÷(0.125×0.8), =14.5×100+14.5×2,
=7.8÷0.1, =1450+29,
=78 =1479;
(176)37.5÷[0.3×(1.34﹣0.84)], (188)14.64+3.7×2.8,
=37.5÷[0.3×0.5], =14.64+10.36,
=37.5÷0.15, =25;
=250; (189)8.4÷0.21÷0.5,
(177)(2.5+27.75÷1.5)×1.6, =40÷0.5,
=(2.5+18.5)×1.6, =80
=21×1.6, (190)0.125×9×8×0.3,
=33.6 =(0.125×8)×(9×8),
(178)6.21﹣3.8+2.2, =1×72,
=2.41+2.2, =72;
=4.61; (191)4.62÷5÷0.66,
(179)6.03+3.7+2.97, =4.62÷(5×0.66),
=(6.03+2.97)+3.7, =4.62÷3.3,
=9+3.7, =1.4;
=12.7; (192)5.78×2.3+5.78+5.78×6.7,
(180)17.43﹣6.57﹣2.43, =5.78×(2.3+1+6.7),
=17.43﹣(6.57+2.43), =5.78×10,
=17.43﹣9, =57.8;
=8.43; (193)7.75×[20÷(3.24﹣3.04)],
(181)20.47﹣(1.47+6.8), =7.75×[20÷0.2],
=20.47﹣1.47﹣6.8, =7.75×100,
=19﹣6.8, =775
小数混合运算--- 17(194)1.25×0.5×8×0.2, =4.2×3.15+6.3,
=(1.25×8)×(0.5×0.2), =13.23+6.3,
=10×0.1, =19.53;
=1; (207)15.02﹣6.8﹣(1.02+1.2 ),
(195)0.97×9+0.97, =15.02﹣6.8﹣1.02﹣1.2,
=0.97×(9+1), =(15.02﹣1.02)﹣(6.8+1.2),
=0.97×10, =14﹣8,
=9.7; =6;
(196)5.4÷[3×﹙3.8﹣2.9﹚], (208)0.6×[(5﹣0.68)÷1.2],
=5.4÷[3×0.9], =0.6×[4.32÷1.2],
=5.4÷2.7, =0.6×3.6,
=2 =2.16;
(197)0.4×(3.2﹣0.8)÷0.15, (209)2.7÷4+6.3×0.25,
=0.4×2.4÷0.15, =2.7×0.25+6.3×0.25,
=0.96÷0.15, =(2.7+6.3)×0.25,
=6.4; =9×0.25,
(198)5.7+1.9×0.2÷7.6, =2.25;
=5.7+0.38÷7.6, (210)(6.02+2.8 )÷0.4﹣2.05,
=5.7+0.05, =8.82÷0.4﹣2.05,
=5.75; =22.05﹣2.05,
(199)32.4×6.3+32.4×3.7, =20;
=32.4×(6.3+3.7), (211)3.08×3.5+6.2×3.08+3.08×0.3,
=32.4×10, =(3.5+6.2+0.3)×3.08,
=324; =10×3.08,
(200)18.2﹣10.6×(0.9﹣0.75), =30.8
=18.2﹣10.6×0.15, (212)2.3+3.91÷(22﹣19.7),
=18.2﹣1.59, =2.3+3.91÷2.3,
=16.61; =2.3+1.7,
(201)0.25×3.85×40, =4;
=0.25×40×3.85, (213)21.6÷[64.8﹣(48.6﹣2.7×2)],
=10×3.85, =21.6÷[64.8﹣(48.6﹣5.4)],
=38.5; =21.6÷[64.8﹣43.2],
(202)1.46×3.5+3.5×4.54, =21.6÷21.6,
=3.5×(1.46+4.54), =1
=3.5×6, (214)93.6×3.6+1.4×3.6,
=21 =(93.6+1.4)×3.6,
(203)7×12.5×0.8, =95×3.6,
=7×(12.5×0.8), =(100﹣5)×3.6,
=7×10, =100×3.6﹣5×3.6,
=70; =360﹣18,
(204)4.7×3.6+4.7×6.4, =342;
=4.7×(3.6+6.4), (215)0.25×0.8×0.125×0.4,
=4.7×10, =(0.25×0.4)×(0.8×0.125),
=47; =0.1×0.1,
(205)1.45×[(2.8+4.4)÷2.4], =0.01;
=1.45×[7.2÷2.4],
=1.45×3, (216)2.7×1.5﹣2.7,
=4.35 =2.7×(1.5﹣1),
(206)4.2×(6.18﹣3.03)+6.3, =2.7×0.5,
小数混合运算--- 18=1.35; =53.8;
(217)9.08+5.45+11.92+4.55, (230)76.3×27﹣76.3×17
=(9.08+11.92)+(5.45+4.55), =76.3×(27﹣17),
=21+10, =76.3×10,
=31; =763.
(218)1.25×30×1.2×0.8, (231)7.05×23.7+7.05×76.3
=(1.25×0.8)×(30×1.2), =(23.7+76.3)×7.05,
=1×36, =100×7.05,
=36 =705
(219)0.6+0.94﹣0.208, (232)[(7.6﹣5.2)÷0.4+2.54]×32,
=1.54﹣0.208, =[2.4÷0.4+2.54]×32,
=1.332; =[6+2.54]×32,
(220)4.85×1.25×8, =8.54×32,
=4.85×(1.25×8), =273.28
=4.85×10, (233)17.68÷5.2+2.7×1.5,
=48.5; =3.4+4.05,
(221)(64﹣22.4÷1.4)×1.2, =7.45;
=(64﹣16)×1.2, (234)35.6﹣5×1.73,
=48×1.2, =35.6﹣8.65,
=57.6; =26.95;
(222)18.3﹣6.25﹣3.75, (235)(1.1﹣0.78)×(2.7﹣1.95),
=18.3﹣(6.25+3.75), =0.32×0.75,
=18.3﹣10, =0.24
=8.3; (236)1.3×0.75×4,
(223)2.8×3.6+1.4×2.8, =1.3×3×0.25×4,
=2.8×(3.6+1.4), =1.3×3×(0.25×4),
=2.8×5, =3.9×1,
=14; =3.9;
(224)6.6÷[14.5﹣(1.7+1.8)], (237)1.08÷1.8×1.2,
=6.6÷[14.5﹣3.5], =0.6×1.2,
=6.6÷11, =0.72;
=0.6 (238)50.4×1.9﹣1.8,
(225)0.25×9.87×4, =95.76﹣1.8,
=0.25×4×9.87, =93.96;
=1×9.87, (239)0.82×0.25+1.18×0.25,
=9.87; =(0.82+1.18)×0.25,
(226)7×2.1+10.8, =2×0.25,
=77.07+10.8, =0.5
=87.87; (240)8.5×[(2.36+2.42)÷0.25],
(227)8.45﹣0.45×0.1, =8.5×[4.78÷0.25],
=8.45﹣0.045, =8.5×19.12,
=8.405; =162.52;
(228)0.73×102,
=0.73×(100+2), (241)3.9÷[(1.3+0.6)×6﹣3.6],
=0.73×100+0.73×2, =3.9÷[1.3×0.6+0.6×6﹣3.6],
=73+1.46, =3.9÷[0.78+3.6﹣3.6],
=74.46; =3.9÷0.78,
(229)7.8×5.6+2.3×4.4, =5;
=43.68+10.12, (242)4.25×6.3+3.7×4.25,
小数混合运算--- 19=4.25×(6.3+3.7), (254)6.62×0.84=5.5608;
=4.25×10, 6.62
=42.5;
(243)205×0.99,
=205×(1﹣0.01),
;
=205×1﹣205×0.01,
=205﹣2.05,
=202.95; (255)2.07÷0.023=90;
(244)25.6﹣7.49﹣2.51,
=25.6﹣(7.49+2.51),
=25.6﹣10,
=15.6;
(245)[2.5﹣(6.8﹣4.9)]×0.8,
=[2.5﹣1.9]×0.8, (256)[20.026﹣(8.6+9.7)×0.92]÷30.19,
=0.6×0.8, =[20.026﹣18.3×0.92]÷30.19,
=0.48 =[20.026﹣16.836]÷30.19,
(246)102×4.5, =3.19÷30.19,
=(100+2)×4.5,
= .
=100×4.5+2×4.5,
=450+9,
=459; (257)0.125×32×2.5,
(247)3.4÷[(1.2+0.5)×5], =0.125×8×4×2.5,
=3.4÷[1.7×5], =(0.125×8)×(4×2.5),
=3.4÷8.5, =1×10,
=0.4; =10;
(248)8×(20﹣1.25), (258)0.8×6.3﹣0.8×3.8,
=8×20﹣8×1.25, =(6.3﹣3.8)×0.8,
=160﹣10, =2.5×0.8,
=150; =2;
(249)0.654+10.9×6.5, (259)50.4÷3.2×2.08,
=0.654+70.85, =15.75×2.08,
=71.504; =32.76;
(250)22.7×1.25×0.8, (260)204÷(3.4×0.5),
=22.7×(1.25×0.8), =204÷1.7,
=22.7×1, =120;
=22.7; (261)(43.26+2.34)÷7.5,
(251)3.91×2.8+6.09×2.8, =45.6÷7.5,
=(3.91+6.09)×2.8, =6.08;
=10×2.8, (262)(20﹣0.8×9)×5.7,
=28 =(20﹣7.2)×5.7,
(252)6.23+3.09=9.32, =12.8×5.7,
6.23 =72.96
(263)13.25﹣0.8+1.75﹣1.2,
;
=(13.25+1.75)﹣(1.2+0.8),
=15﹣2,
(253)132.4﹣59.8=72.6; =13;
132.4 (264)2.5×99+2.5,
=2.5×(99+1),
;
=2.5×100,
小数混合运算--- 20=250; =0.487÷48.7×12.5,
(265)10.36+4.8﹣16.5÷5, =0.01×12.5,
=10.36+4.8﹣3.3, =0.125;
=15.16﹣3.3, (272)(8.16+2.09)÷[(10.3﹣9.3)÷0.4],
=11.86; =10.25÷[1÷0.4],
(266)12.5×2.4, =10.25÷2.5,
=12.5×(8×0.3), =4.1
=(12.5×8)×0.3, (273)1.56×1.7+0.44×1.7,
=100×0.3, =(1.56+0.44)×1.7,
=30 =2×1.7,
(267)38.78﹣19.59+41.22﹣30.41, =3.4;
=38.78+41.22﹣19.59﹣30.41, (274)12.5×(7.2﹣1.9)×0.8,
=(38.78+41.22)﹣(19.59+30.41), =12.5×5.3×0.8,
=80﹣50, =12.5×0.8×5.3,
=30; =10×5.3,
(268)2.74×4.86+4.86×6.26+4.86, =53;
=(2.74+6.26+1)×4.86, (275)0.25×2010+20.10×75,
=10×4.86, =0.25×2010+2010×0.75,
=48.6; =2010×(0.25+0.75),
(269)0.08×(12.5+2.5)×0.1, =2010×1,
=(0.08×12.5+0.08×2.5)×0.1, =2010;
=(1+0.2)×0.1, (276)30.8÷[(6.34﹣4.59)×4],
=1.2×0.1, =30.8÷[1.75×4],
=0.12; =30.8÷7,
(270)25.92+(10.1﹣14.5×0.2), =4.4.
=25.92+(10.1﹣2.9),
=25.92+7.2,
=33.12;
(271)0.487×12.5÷48.7,
小数混合运算--- 21小数混合运算--- 22