Question

Знайди значення виразу 2 1/4(10-71/12х1 1/5)=

Answer 1

$2 \frac{1}{4} (10 - \frac{71}{12} \times 1 \frac{1}{5} ) = 6 \frac{21}{40}$

1.

$\frac{71}{12} \times 1 \frac{1}{5} = \frac{71}{12} \times \frac{6}{5} = \frac{71 \times 6}{12 \times 5} = \frac{71 \times 1}{2 \times 5} = \frac{71}{10} = 7 \frac{1}{10}$

2.

$10 - 7 \frac{1}{10} = 9 \frac{10}{10} - 7 \frac{1}{10} = 2 \frac{9}{10}$

3.

$2 \frac{1}{4} \times 2 \frac{9}{10} = \frac{9}{4} \times \frac{29}{10} = \frac{9 \times 29}{4 \times 10} = \frac{261}{40} = 6 \frac{21}{40}$

Answer 2

6 21/40

Пошаговое объяснение:

1) 71/12 * 1 1/5 = 71/12 * 6/5 = 71/2 * 1/5 = 71/10 = 7 1/10

2) 10 - 7 1/10 = 9 10/10 - 7 1/10 = 2 9/10

3) 2 1/4 * 2 9/10 = 9/4 * 29/10 = 261/40 = 6 21/40