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Doresc rezolvarea
3×9+7×2+7:7=
100-10×(10-10×0)=
(3×9+8×6-5×5):5:10=
(614-600):2×9+10×9=
81-45:(18-3×3):5=


Răspuns :

3•9+7•2+7:7=27+14+1=41
100-10•(10-10•0)=100-10•10=0
(3•9+8•6-5•5):5:10=(27+48-25):5:10=50:5:10=1
(614-600):2•9+10•9=14:2•9+10•9=7•9+70=49+70=109
81-45:(18-3•3):5=81-45:9:5=81-5:5=80