Question

1) 5 1/16-1 1/8×(5/6+3/14)=

2)(7-1 5/9:7/24)×1 7/20=

3) у-5/6=4,2/3=

Answer 1

примеры расставлены не по порядку. поэтому внимательнее .

Answer 2

Объяснение:

№1

1) 5/6 + 3/14 = 35/42 + 9/42 = 44/42 = 22/21

2) 1 1/8 * 22/21 = 9/8 * 22/21 = 3/4 * 11/7 = 33/28 = 1 5/28

3) 5 1/16 - 1 5/28 = 5 7/112 - 1 20/1112 = 4 119/112 - 1 20/112 = 3 99/112

№2

1) 1 5/9 : 7/24 = 14/9 * 24/7 = 2/3 * 8/1 = 16/3 = 5 1/3

2) 7 - 5 1/3 = 6 3/3 - 5 1/3 = 1 2/3

3) 1 2/3 * 1 7/20 = 5/3 * 27/20 = 1/1 * 9/4 = 9/4 = 2 1/4

№3

у - 5/6 = 4 2/3

у = 4 2/3 + 5/6

у = 4 4/6 + 5/6

у = 4 9/6

у = 5 3/6

у = 5 1/2