Предмет: Математика, автор: vakopov2449

Тракторист должен вспахать 12 га земли, но он недоваполнил план на 15%. Сколько гектаров земли вспахал тракторист.

Ответы

Автор ответа: kirichekov

12 га - 100%
х га -15%
х=(12*15):100
х=1,8 га
12-1,8=10,2
ответ: тракторист вспахал 10,2 га

2 способ:
12:100=0,12 га это 1 %
100%-15%=85% вспахал тракторист
0,12*85=10,2 га

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