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a fost răspuns

Efectueaza.3*3+19-4*4=;6*4+3*4-5=;8*5-3*2+7=;5*9-4-3*7=;36:9+5*8-13=;64:8+56:8-3=;54:9:3+8=;72:8*5-4=

Răspuns :

AdyIrimia31
3x3+19-4x4=9+19-16=28-16=12
6x4+3x4-5=24+12-5=36-5=31
8x5-3x2+7=40-6+7=34+7=41
5x9-4-3x7=45-4-21=41-21=20
36:9+5x8-13=4+40-13=44-13=31
64:8+56:8-3=8+7-3=15-3=12
54:9:3+8=6:3+8=3+8=11
72:8x5-4=9x5-4=45-4=41

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