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Calculeaza si tu in doua moduri
(17+36)×3=
(243-257)×4
6×(105+43)=
(42-15)×7=


Răspuns :

I. (17+36)×3=53 ×3= 159
II.(17+36)×3=51+108=159

I.(243-257)×4= -14 ×4= -56
II.(243-257)×4= 927-1028=-101

I.6×(105+43)=6×148=888
II.6×(105+43)=630+258=888

I.(42-15)×7=27×7=189
II.(42-15)×7=294-105=189