Question

помогите плиз умоляяю​

Answer 1

Ответ:

а)16 целых 4/15

б)4 целых 4/15

Пошаговое объяснение:

а) (2 5/6+1 7/9) * 3 3/5 + (2 5/6-1 7/9) * (-2 16/19)

2 5/6+1 7/9 = 17/6+16/9 = (51+32)/18 = 83/18

2 5/6-1 7/9 = 17/6-16/9 = (51-32)/18 = 19/18

83/18*3 3/5 = 83/18*18/5 = 83/5

19/18*(-2 16/19) = 19/18*(-54/19) = -1/3

83/5+(-1/3) = 83/5-1/3 = (249-5)/15 = 244/15 = 16 4/15

б) (2 2/15 + 2 7/10) : 1 2/27 - (2 7/10 - 2 2/15) : 2 3/7

(32/15 + 27/10) : 29/27 - ( 27/10 - 32/15) : 17/7 =

32/15 + 27/10=64/30+81/30= 145/30= 29·5/6·5 = 29/6

27/10 - 32/15=27·3/ 10·3 - 32·2/ 15·2 = 81/30 - 64/30=(81 - 64)/30 = 17/30

29/6 : 29/27 - 17/30: 17/7 =29/6 * 27/29 - 17/30* 7/17 =

27/6 - 7/30 = 27·5 /6·5 - 7·1/ 30·1 = 135/30 - 7/30 = 135 - 7 /30 = 128/ 30 = 64·2/ 15·2 = 64/ 15 = 4 + 4·15/ 15 = 4 4/ 15