3,65:0,8=36,5 /8
32 4,5625
____
45
40
___
50
48
____
20
16
___
40
40
___
0
2/3-(5/6-х)=1/12
2/3-5/6+х=1/12
Х=1/12-2/3+5/6
Х=1/12-8/12+10/12
Х=-7/12+10/12
Х=3/12
Х=1/4=25/100=0,25
1) 7*13 - 7*8= 91-56
2) 42*15-24*15 = 630-360
3) 10*15-10*6 = 150-60
4) 5*18-5*7 =90-35
5) 9*12-3*12 = 108-36
6) 91*7-1*7 = 637-7