Реши примеры : 37+ (66-28)- (30- 23) 2)(80-46)+(90-64) 3) 54+16-39+48 4)75 - 49 - 14 + 36 Реши уравнения : ×*19 = 0 ; 78*×=78 ; 0 = 17 * × ; 52 = × * 52
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