Question

Помогите решить пожалуйста

Answer 1

№1

8 / 5 × 4 = 8/20 = 2/5

№2

2/25 + 1/4 = 8/100 + 25/100 = 18/100 = 9/50

№3

19/5 - 11/10 = 38/10 - 11/10 = 27/10 = 2 целых 7/10

№4

21/25 : 7/5 = 21/25 × 5/7 = 105/175 = 3/5

№5

68/35 × 105/34 = 7140/1190 = 6

№6

2/ 1 + 1/9 = 2 / 10/9 = 2 / 10 : 9 = 1 целая 4/5

№7

1 / 1/30 + 1 /42 =1 / 42/1260 + 32/1260 = 1 / 74/1260 = 630/37 = 17 целых 1/37

№8

(1/13 - 11/4) × 26 = (4/52 - 143/52) × 26 = - ( 143/52 - 4/52 ) × 26 = - 139/52 × 26 = - 3614/- 52 = - 69 целых 26/52 = -69 целых 1/2 = -69,5

№9

(4/15 + 19/25) × 6/7 = (20/75 + 57/75) × 6/7 = 77/75 × 6/7 = 462/525 = 22/25

№10

(17/16 - 1/32) : 11/24 = (34/32 - 1/32) : 11/24 = 33/32 : 11/24 = 33/32 × 24/11 = 792/352 = 9/4 = 2 целых 1/4