Question

Решите 4 больший дроби по действиям. Даю 100 баллов (Обязательно с решением)

Answer 1

Пошаговое объяснение:

а)

1) 21 : 8 3/4 = 21 : 35/4 = 21 * 4/35 = 3 * 4/5 = 12/5 = 2 2/5

2) 9 9/10 : 6 3/5 = 99/10 : 33/5 = 99/10 * 5/33 = 3/2 * 1/1 = 3/2 = 1 1/2

3) 2 2/5 - 1 1/2 = 2 4/10 - 1 5/10 = 1 14/10 - 1 5/10 = 9/10

б)

1) 4 4/5 : 18 = 24/5 * 1/18 = 4/5 * 1/3 = 4/15

2) 14/15 * 5/8 = 7/3 * 1/4 = 7/12

3) 4/15 + 7/12 = 16/60 + 35/60 = 51/60 = 17/20

в)

1) 3 1/6 - 1 3/4 = 3 2/12 - 1 9/12 = 2 14/12 - 1 9/12 = 1 5/12

2) 1 5/12 * 10 = 17/12 * 10 = 170/12 = 14 2/12 = 14 1/6

3) 4 5/8 + 14 1/6 = 4 15/24 + 14 4/24 = 18 19/24

г)

1) 2 5/21 - 1 2/3 = 2 5/21 - 1 14/21 = 1 26/21 - 1 14/21 = 12/21 = 4/7

2) 3 1/3 : 4/7 = 10/3 * 7/4 = 70/12 = 35/6 = 5 5/6

3) 10 2/9 - 5 5/6 = 10 4/18 - 5 15/18 = 9 22/18 - 5 15/18 = 4 7/18