Question

помагите сооооооооч ​

Answer 1

Ответ:

7/5 * 3/5 = 7*3 / 15*21 =15

10/3 * 7/5 = 2/3 * 7 = 14/3 = 4.6

7*9/49=9

Answer 2

a)
7/15*3/21=
7*3/ 15*21=
1*1/ 5*3=
1/15

б)
3 1/3* 1 2/5=
10/3* 7/5=
10*7/ 3*5=
2*7/3*1=
14/3=
4 2/3

с)
7* 9/49=
7*9/49=
1*9/7=
9/7=
1 2/7