Question

ДАЮ 100 БАЛІВ!! обчисли 4/7 +2/7 = , 7/9 - 2/9= , 4 2/5+ 2 3/5 =, 1- 2/7= , 3 2/8 + 2 5/8 = , 3 2/8 - 1 5/8 = ​

Answer 1

Ответ:

4/7+2/7=9/7=1 2/7

7/9-2/9=5/9

4 2/5+2 3/5=22/5+71/5=93/5=18 3/5

1-2/7=5/7

3 2/8+2 5/8=26/8+21/8=47/8=5 7/

3 2/8-1 5/8=26/8-13/8=13/8=1 5/8

Answer 2

Пошаговое объяснение:

4/7 + 2/7 = (4 + 2)/7 = 6/7

7/9 - 2/9 = (7-2)/9 = 5/9

4 2/5 + 2 3/5 = (4+2) + (2+3)/5 = 6 + 5/5 = 6 +1 = 7

1 - 2/7 = 7/7 - 2/7 = (7-2)/7 = 5/7

3 2/8 + 2 5/8 = (3+2) + (2+5)/8 = 5 + 7/8 = 5 7/8

3 2/8 - 1 5/8 = 2 10/8 - 1 5/8 = 1 5/8