Дроби.. 9/10 - 3/10= 7/9-5/7= 5/6+1/9=

Question

Дроби..
9/10 - 3/10=

7/9-5/7=

5/6+1/9=

Answer 1

9/10-3/10=6/10
7/9-5/7 приводим к общ.знаменателю. 9 домножаем на 7, 7 на 9. 49/63-45/63=4/63