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SKILL SET: MEnTaL CaLCuLaTIonS • Multiply the first number of your age by 5. • Add 3. • Double this number. • Add the second number of your age to the result. • Deduct 6. What do you get? Try it with your friends. Learning Maths Book 1 © Singapore Asia Publishers Pte Ltd. All rights reserved. Reproducible for home/classroom use only. STRICTLY NOT FOR SALE.