Вычислите (1/8+2/9-1/4)*5 1/7: (7/9-2/3+1/6) (10 - вопрос №356976818291451779231610341211549216 от приветки1 30.04.2020 17:51

Question

Математика: Вычислите (1/8+2/9-1/4)*5 1/7: (7/9-2/3+1/6) (10 3/4-12: 1 1/5)*4/9+2 1/6+3 1/4 : 5 1/5

приветки1 · Answer

(1/8+2/9-1/4)* 5 1/7:(7/9-2/3+1/6) = 1 4/5
1/8 - 1/4 = -1/8
-1/8+2/9 = -9/72 + 16/72 = 7/72
7/72*5 1/7 = 7/72*36/7=1/2

7/9-2/3 = 7/9-6/9=1/9
1/9+1/6= 6/54+9/54=15/54
1/2:15/54 = 9/5 = 1 4/5

(10 3/4-12:1 1/5)*4/9+2 1/6+3 1/4:5 1/5 = 3 1/8

12:1 1/5 = 12:6/5=12*5/6 = 10
10 3/4-10=3/4
3/4*4/9= 1/3

3 1/4:5 1/5 = 13/4:26/5 = 13/4*5/26=5/8
1/3 + 2 1/6 = 2/6+2 1/6 = 2 3/6 = 2 1/2
2 1/2 + 5/8 = 2 4/8 + 5/8 = 2 9/8 = 3 1/8