Răspuns:
4×a=204
a=204:4
a=51
4×51=204
b:8=245 rest 6
b=8×245+6
b=1960+6
b=1966
1966:8=245 rest 6
384:c=4
c=384:4
c=96
384:96=4
ex3:
a) (145×6)+(624:3)=
870+208=1078
b)(309+597)-(945:7)=
906-135=771
c)717:3=239
d)112:4=28
112:2=56
ex.4
10×25+75×(555-549)=
10×25+75×6=
250+450=700
[(163×4+348):100+182]:2+30690=
[(652+348):100+182]:2+30690=
[1000:100+182]:2+30690=
[10+182]:2+30690=
192:2+30690=
96+30690=30786
