Вычисляя значения выражения,определи,какие равенства верны,а какие нет
(6*7)+(6*8)=130-40
7*(23-18)=42-8
280+70=170+180
300*2=20*30
120:(6:2)=(120:6):2
(640-140)-100=640-(140-100)
(270+130):2=2*5=(270+130):(2*5)
(24+36)*10:2=(24+36)*(10*2)
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