Question

Помогите как решить 5/32×48,8/51×17/20,7/15×21,7/12:3/4,15:1 целая 23.

Answer 1

5/32 * 48=(5*8*6) / (8*4)=(5*3)/2=15/2=7 1/2

8/51 * 17/20=(4*2*17) / (17*3*4*5)=2/15

7/15 * 21=(7*7*3)/(3*5)=49/5=9 4/5

7/12 : 3/4=7/12 * 4/3=(7*4) / (4*3*3)=7/9

15 : 1 2/3=15 : 5/3=15 * 3/5=(5*3*3)/5=9