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1) calcleaza si incercieste raspnsl corect:

23+7*(36/9+28/7)-(6*4-15/5)=

a)57
b)48
c)52
d)58
e)61

2) foloseste simbolurile operatiilor invatate pentru a obtine egalitati:


a)3?3?3?3=2
b)1?1?1?1=3
c)8?8?8?8=15
d)9?9?9?9=82
e)4?4?4?4=5