Question

пж срооочно даю 40 баллов​

Answer 1

1. 0,6 ÷ 2/9= 6/10 ÷2/9= 3/5 ÷2/9=3/5+9/2=27/17=2 7/10

2.4/7 ÷ 1 3/4=4/7÷7/4=4/7×4/7=14/49

3.1 2/5 ÷10,5=7/5÷10 1/2=7/5÷21/2=7/5×2/21=2/15

Ответ: 1-А, 2-В, 3-Б.