Question 11 of 47intermediate🔧 ApplyNumerical6 marks

Find the products of the following numbers by finding the nearest multiple. 1) 7×527 \times 52 2) 12×2812 \times 28 3) 75×3175 \times 31 4) 99×1599 \times 15 5) 8×258 \times 25 6) 22×4222 \times 42

(1)
Answer

364

(2)
Answer

336

(3)
Answer

2325

(4)
Answer

1485

(5)
Answer

200

(6)
Answer

924

Explanation

(1) 7×527 \times 52 = 7×507 \times 50 + 7×27 \times 2 = 350 + 14 = 364 (2) 12×2812 \times 28 = 12×3012 \times 30 - 12×212 \times 2 = 360 - 24 = 336 (3) 75×3175 \times 31 = 75×3075 \times 30 + 75×175 \times 1 = 2250 + 75 = 2325 (4) 99×1599 \times 15 = 100×15100 \times 15 - 1×151 \times 15 = 1500 - 15 = 1485 (5) 8×258 \times 25 = 200 (or use doubling and halving: 4×504 \times 50 = 200) (6) 22×4222 \times 42 = 22×4022 \times 40 + 22×222 \times 2 = 880 + 44 = 924

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