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7 Rezolvă, după model:
(24:6) + (30: 6) = (24 +30): 6 = 54 : 6 = 9
a) (25:5) + (15:5) =
(40:8)+(32:8)=
b) (42: 7) + (14:7)
(16:4) + (24:4)=​