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{9•(26-6•4)-7•[20-(6+3•4)]}-{8•5-[12+7•3)]•(21-9•2)}dau coroana va roggg repede!!!

Răspuns :

Răspuns:

{9•(26-6•4)-7•[20-(6+3•4)]}-{8•5-[12+7•3)]•(21-9•2)}=

={9•(26-24)-7•[20-(6+12)]}-{40-[12+21)]•(21-18)}=

={9•2-7•[20-18]}-{(40-33)•3}=

={18-7•2}-{7•3}=

=(18-14)-21=4-21=-17

Explicație pas cu pas: