Răspuns:
a)
x=425-304
x=121
b)8672-x=125
x=8672-125=8547
c)6•a=456
a=456:6=76
d)a:31=642
a=642•31=19902
Răspuns:
.
Explicație pas cu pas:
a)304+x=425
x=425-304
x=121
Verific:
121+304=425
b)8672-x=125
x=8672-125
x=8547
Verific:
8547+125=8672
c)6×a=456
a=456:6
a=76
Verific:
76×6=456
d)a:31=642
a=642×31
a=19902
Verific:
19902:31=642
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