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efectuați (6×8+7×6) -9×7- (7×5-9×3)=

Răspuns :

=(48+42)-63-(35-27)
=90-63-8
=19
(6•8+7•6)-9•7-(7•5-9•3)
=(48+42)-9•7-(35-27)
=90-9•7-8
=90-63 -8
=19