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[(56:7-3).9-(8+2.9-4):2]:2

Răspuns :

[(56:7-3)×9-(8+2×9-4):2]:2 =


[(8-3)×9-(8+18-4):2]:2 =


[5×9-(20:2]:2 =

=(45-10):2

=35/2

=17 intregi si 1/2

=17,5
[(8-3).9-(8+2. 9-4):2]:2 [5.9-(10.5):2]:2 [5.9-50:2]:2 [45-25]:2 20:2=10