Question

Решите пж 2 задание по действиям пжжжжжжжж даю 40 баллов

Answer 1

Ответ:

А)3 5/6-2 3/4 = 3 10/12 - 2 9/12 = 1 1/12

11/12:7/12=13/12^ * 12/7 = 13/7 = 16/7

16/7+5 1/2 = 1 12/14+5 7/14-6 19/14-7 5/14

Б)8 1/2-3 1/2: (2 1/2 + 13/4 ) 2 3/7= 8 1/2-7/2: (5/2+7/4)*17/7= 8 1/2-7/2:(10/4+7/4)*17/7=

8 1/2 - 7/2 / 17 /4^ * 17/7=8 1/2-7/2^ * 4/17^ * 17/7=

8 1/2-2=6 1/2

В)2 2/3×(2 1/3+2 5/12)-4 4/5=7 13/15

1)2 1/3+2 5/12 = 2 4/12+2 5/12=4 9/12 = 4 3/4

2)2 2/3 * 4 3/4 = 8/3 * 19 / 4 = 2/3 * 19 / 1 = 38/3 = 12 2/3

3)12 2/3 - 4 4/5 = 12 10/15-4 12/15 = 11 25/15 - 4 12/15 = 7

13/15

Г)9 2/7+1 7/9:(2 2/5-1 1/3)*3/7=10

1) 2/5 - 11/3 = 12/5 - 4/3 = (36 - 20) / 15 = 16/15

2) 17/9 / 16 / 15 =16/9^ * 15/16=15/9

3) 15/9^ * 3/7 = 5/7

4) 9 2/7 + 5/7 = 10