Предмет: Математика, автор: instasamkaedit4

Вычислите наиболее простым способом.2 1/3×(14 5/7×3/7) а)7/3 б)14 5/7 в)3/7 г)30/7
помогите пжжж.И напишите решение​


mrknay: а можно фотку учебника этого номера
mrknay: а то так тяжело

Ответы

Автор ответа: LLIKOJIHNK
0

Ответ:

 2\frac{1}{3}  \times (14 \frac{5}{7}  \times  \frac{3}{7} )  \\   2\frac{1}{3}  \times ( \frac{14 \times 7 + 5}{7}  \times  \frac{3}{7} ) \\  2\frac{1}{3}  \times ( \frac{103}{7}  \times  \frac{3}{7} ) \\  2\frac{1}{3}  \times  \frac{309}{49}  \\  \frac{103}{7} = 14 \frac{5}{7}

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