Question

Найдите значение выражения : а)
б)
в)
г)
д)
е)
​

$1 \times \frac{5}{7} + 2 \times \frac{3}{7} + 1 \times \frac{4}{7}$
$13 \times \frac{4}{7} + 5 \times \frac{5}{7} - 2 \times \frac{6}{7}$
$5 \times \frac{1}{5} - 3 \times \frac{3}{5} + 4 \times \frac{4}{5}$
$7 \times \frac{11}{16} + 2 \times \frac{5}{16} - 8 \times \frac{7}{16}$
$24 \times \frac{1}{15} - 12 \times \frac{4}{15} - 2 \times \frac{3}{15}$
$8 \times \frac{2}{5} - 1 \times \frac{4}{5} - 2 \times \frac{3}{5}$

Answer 1

Пошаговое объяснение:

a) = (1 + 2 + 1) + ( 5/7 + 3/7 + 4/7) = 4 + 12/7 = 5 5/7

б) = ( 13 + 5 - 2) + ( 4/7 + 5/7 - 6/7) = 16 + 3/7 = 16 3/7

в) = (5 + 4 - 3) + ( 1/5 + 4/5 - 3/5) = 6 + 2/5 = 6 2/5

г) = (7 + 2 - 8) + (11/16 + 5/16 - 7/16) = 1 + 9/16 = 1 9/16

д) = (24 - 12 - 2) - (4/15 + 3/15 - 1/15) = 10 - 6/15 = 9 9/15 = 9 3/5

e) = (8 - 1 - 2) - (4/5 + 3/5 - 2/5) = 5 - 5/5 = 5 - 1 = 4