ответ:1)12*100:3=400;
15*100:3=500;
21*100:3=700;
24*100:3=800;
36*100:3=1200;
2)0,4*100:10=4;
5,8*100:10=58;
9,25*100:10=92,5;
12,7*100:10=127;
28*100:10=280;
3)42*100:60=70;
72*100:60=120;
84*100:60=140;
102*100:60=170;
114*100:60=190.
ответ:1)12*100:3=400;
15*100:3=500;
21*100:3=700;
24*100:3=800;
36*100:3=1200;
2)0,4*100:10=4;
5,8*100:10=58;
9,25*100:10=92,5;
12,7*100:10=127;
28*100:10=280;
3)42*100:60=70;
72*100:60=120;
84*100:60=140;
102*100:60=170;
114*100:60=190.