(4-(4 21/40-5 25/100))÷1 7/20=
=(4-4 21/40+5 1/4)÷1 7/20=
=(-21/40+21/4)÷27/20=
=(-21/40+210/40)×20/27=
=189/40×20/27=7/2=3 1/2=3.5
24- 2,3;
40-2,5;
56-2,7;
65-5,13;
77-7,11;
95-5,19.
1)<span>5617-х*60=4177
60*x=5617-4177
60*x=1440
x=1440/60
x=24
2)</span><span>d*60=5600-4160
d*60=1440
d=1440/60
d=24</span>
Решение в приложении
..............................
1) 270
2) 270
3) 270
4)270
5)270