Verified answer

Explications étape par étape:

A = [ ( - 8 - 2) ]× (-10)

A = -10 × (-10)

A = 100

B = [(7×7×2×5)/(3×5×3×7) ÷ 2/9

B = [( 7×2)/(3×3)] ÷ 2/9

B = 14/9 ÷ 2/9

B = 14/9 × 9/2

B = (2×7×9)/(9×2)

B = 7