Ответ:

3/10•2 2/9=3/10•20/9=2/3

5 1/7•2=72/7=10 2/7

1 1/9•1 4/5=10/9•9/5=2

8/7:2 2/7=8/7:16/7=1/2

9 3/5:6=48/5:6=8/5=1 3/5

2 2/3:1 7/9=8/3:16/9=3/2=1 1/2

Задание 2

3 1/3•1 1/5-4 2/11:2=

10/3•6/5-46/11:2=

4-23/11=4-2 1/11=1 10/11

3 3/7•8 5/9-3 3/7•6 5/9=

24/7•77/9-24/7•59/9=24/7•(77/9-59/9)=

24/7•(8 5/9-6 5/9)=24/7•2=48/7=6 6/7

Задание 3

1 2/11•1 2/13•1 2/15•1 2/17•1 2/19•1 2/21=

13/11•15/13•17/15•19/17•21/19•23/21=23/11=

2 1/11

Пошаговое объяснение: