2 3 4 5 9 10 12 = 9002 3 = 64 2 = 4<span>5 4 9 = 900</span>
А)81-х=6; х=81-6; х=75;///
б)2× y=18; у=18:2; у=9;////
в)m+15=80; m=80-15; m=65;///
г)t÷9=60; t=60*9; t=540;////
д)k-17=45; k=45+17; k=62;////
e)48÷ n=12; n=48:12; n=4
1)630:7=90
2)4*9=45
3)90+45=135
4)5:5=1
5)5+1=6
6)8-8=0
7)35*7=245
8)245+49=294
9)135:6=22,5
10)0:294=0
11)22,5+0=22,5
360×370÷5,60=23 785,714285714