(2 целых 1/4 - 1 целая 1/2) * 8 =( 2 1/4 - 1 2/4)* 8 = 3/4 * 8= 24/4= 6
A21=a1+20d
15=5+20d
20d=10
d=0,5
4,25у + 16,9 + 1,5у - 11,203 = 5,75у + 16,9 - 11,203 = 0,4646 + 16,9 - 11,203 = 6,1616.
1)<span>2,46:4,1=0,6
2)</span><span>15:0,25=60
3)</span><span>4:25=0,16
4)</span><span>14,4:0,32=45
5)0,6+60=60,6
6)60,6-0,16=60,44
7)60,44-45=15,44</span>