Question

помогите пожалуйста номера 378, 380 заранее спасибо)

Answer 1

378.

а) 1/4 - (1 - 11/12) = 1/4 - 1/12 = 1/6

б) 2 - (13/33 - 5/22) = 2 - 1/6 = 1 5/6

в) 6 3/16 - (2 3/8 + 3 5/12) = 6 3/16 - 5 19/24 = 19/48

г) 8 1/12 - 3 4/15 - 1 7/30 = 4 49/60 - 1 7/30 = 3 7/12

д) (13 - 8 5/12) + (17 1/2 - 16 1/5) = 4 7/12 + 1 3/10 = 5 53/60

е) (63 2/3 + 3 1/8) - (13 - 10 5/9) = 66 19/24 - 2 4/9 = 64 25/72

380.

а) Х + 2 2/11 = 5

Х = 5 - 2 2/11

Х = 2 9/11
б) 26 5/8 + а = 30

а = 30 - 26 5/8

а = 3 3/8

в) n - 6 5/6 = 2/9

n = 2/9 + 6 5/6

n = 7 1/18

г) 11 1/4 - х = 3 7/10

11 1/4 - 3 7/10 = х

7 11/20 = х

д) 3 11/24 - х = 1 1/6 + 1 1/9

3 11/24 - х = 2 5/18

3 11/24 - 2 5/18 = х

1 13/72 = х

е) у + 5/7 - 1/8 = 2/3 - 1/14

у = 2/3 + 1/8 - 1/14 - 5/7 = 19/24 - 1/14 - 5/7 = 121/68 - 5/7 = 1 31/476

у = 1 31/476