Question

120.
1) 15/17 = 30/34
2) 8/30=0,4/1,5
3) 0,9/7,1=9/71
4) 0,6/1,3=3,6/7,8​

Answer 1

1) 15/17 = 30/34
15*2/2*17 = 30/34
30/34=30/34
верно.
2) 8/30 = 0,4/1,5
8/30=4*2/10*3
8/30=8/30
верно.
3) 0,9/7,1 = 9/71
0,9*10/7,1 *10= 9/71
9/71 = 9/71
верно.
4) 0,6/1,3 = 3,6/7,8
0,6*6/1,3*6 = 3,6/7,8
3,6/7,8= 3,6/7,8