Question

Помогите,номер 480,490-491(а-г)

Answer 1

первыйвый пример равен 3

Answer 2

37×0,2=3/7×2/10=6/70 ; 3/7:0,2=3/7×2/10=30/21=1 9/21 ; 
2 1/3×1,25=7/3×125/100=875/300=2 375/300 ;
1,25:2 1/3=125/100:7/3=125/100×3/7=375/700