Mental Maths Class 5 Playing with Numbers

Asked by SHLOK · GLOBAL INDIAN INT'L SCHOOL (GIIS), EAST COAST, SINGAPORE

What is 755 × 2?

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Answer: C. 1510

To double 755, double each part: 700 x 2 = 1400 and 55 x 2 = 110. Adding them gives 1400 + 110 = 1510. Option a, 1650, would be 825 x 2.

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