Question

-5 1/4 × (- 2 2/7)+(-6/7)×2 1/3×3 1/4​

Answer 1

Ответ:

5x - 14x 1 2-2x 5+7+1= 13x

Answer 2

Ответ:

$- 5 \frac{1}{4} \times ( - 2 \frac{2}{7} ) + ( - \frac{6}{7} ) \times 2 \frac{1}{3} \times 3 \frac{1}{4} = - \frac{21}{4} \times ( - \frac{16}{7} ) + ( - \frac{6}{7} ) \times \frac{7}{3} \times \frac{13}{4} = \frac{21 \times 16}{4 \times 7} + ( - \frac{6 \times 7 \times 13}{7 \times 3 \times 4} ) = \frac{21 \times 16}{4 \times 7} - \frac{2 \times 7 \times 13}{4 \times 7} = \frac{(21 \times 16) - (2 \times 7 \times 13)}{4 \times 7} = \frac{7 \times 2(3 \times 8- 13)}{4 \times 7} = \frac{3 \times 8 - 13}{2} = \frac{24 - 13}{2} = \frac{11}{2} = 5 \frac{1}{2} = 5.5$