За три дня вспахано 1800 га поля. за первый день вспахано 2/9 поля, а за второй - 1/6 поля. сколько гектаров поля было вспахано за третий день?
di630
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10.03.2019 15:41
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1
за первый день
1800\9*2=400 га
за второй
1800\6= 300 га
за третий
1800- (400+300) = 11оо га