Предмет: Математика, автор: Аноним

Вычислить , применяя распределительный закон:

1) 5 целых 1/4 * 1 целую 9/10 - 5 целых 1/4 * 4 целых 9/10 =
2) 5 целых 1/3 * 4 целых 2/5 + ( -5 целых 1/3 ) * 2 целых 1/5 - 5 целых 1/3 * 1 целую 1/5 =

25 баллов.

Ответы

Автор ответа: Аноним
12
1) 5 1/4 * 1 9/10 - 5 1/4 * 4 9/10 = 5 1/4 * ( 1 9/10 - 4 9/10 ) = 21/4 * ( - 3 ) =
= - 63/4 = - 15 3/4
2) 5 1/3 * 4 2/5 + ( - 5 1/3 ) * 2 1/5 - 5 1/3 * 1 1/5 = 5 1/3 * ( 4 2/5 - 2 1/5 - 1 1/5 ) = 5 1/3 * 1 = 5 1/3
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