Вычислите (3 1/3+5 1/6)*2/5-2 3/4÷(1 1/2-2/5) - вопрос №84537803135162523411225 от elizavetanosova2000 04.03.2020 14:20

Question

Математика: Вычислите (3 1/3+5 1/6)*2/5-2 3/4÷(1 1/2-2/5)

elizavetanosova2000 · Answer

1) 3 1/3 + 5 1/6 = 3 2/6 + 5 1/6 = 8 3/6 = 8 1/2
2) 8 1/2 * 2/5 = 17/2 * 2/5 = 17/5=3 4/10
3) 1 1/2 - 2/5 = 1 5/10 - 4/10 = 1 1/10
4) 2 3/4 : 1 1/10 = 11/4 * 10/11 = 5/2=2 1/2
5) 3 4/10 - 2 1/2 = 3 4/10 - 2 5/10 = 9/10 = 0,9
ответ: 9/10 = 0,9