Question

Розкрий дужки та обчисли: 1. (1/8-1/2)×8
2.-15(1/3-1/5) 3. 9(1/9-1/3+1)

Answer 1

1. (1/8 - 1/2) × 8 = (-3/8) × 8 = -3

2. -15(1/3 - 1/5) = -15(5/15 - 3/15) = -15(2/15) = -2

3. 9(1/9 - 1/3 + 1) = 9(1/9 - 3/9 + 9/9) = 9(7/9) = 7