Решение:
(-7) - (3.6) ÷ (1.2) = -7 - 3 = -10
(6 3/7) ÷ (-9) + 4 1/3 = 48/7 ÷ (-9) + 13/3 = -48/63 + 39/14 = -16/21 + 39/14 = (-32/42) + (117/42) = 85/42
(-7/24) × (-1 1/7) × 3 = (-7/24) × (-8/7) × 3 = (7/24) × (8/7) × 3 = 1/3 × 8 × 3 = 8/3 = 2 2/3
Итак, результаты вычислений1) (-7) - (3.6) ÷ (1.2) = -12) (6 3/7) ÷ (-9) + 4 1/3 = 85/43) (-7/24) × (-1 1/7) × 3 = 2 2/3
Решение:
(-7) - (3.6) ÷ (1.2) = -7 - 3 = -10
(6 3/7) ÷ (-9) + 4 1/3 = 48/7 ÷ (-9) + 13/3 = -48/63 + 39/14 = -16/21 + 39/14 = (-32/42) + (117/42) = 85/42
(-7/24) × (-1 1/7) × 3 = (-7/24) × (-8/7) × 3 = (7/24) × (8/7) × 3 = 1/3 × 8 × 3 = 8/3 = 2 2/3
Итак, результаты вычислений
1) (-7) - (3.6) ÷ (1.2) = -1
2) (6 3/7) ÷ (-9) + 4 1/3 = 85/4
3) (-7/24) × (-1 1/7) × 3 = 2 2/3