Question

как решить 8 7/12+(5 3/40-4 8/15)

Answer 1

$8 frac{7}{12} + (5 frac{3}{40 } - 4 frac{8}{15} )$

По действиям:

1)

$5 frac{3}{40} - 4 frac{8}{15} = frac{203}{40} - frac{68}{15} = frac{609}{120} - frac{544}{120} = frac{65}{120} = frac{13}{24}$

2)

$8 frac{7}{12} + frac{13}{24} = frac{8 times 12 + 7}{12} + frac{13}{24} = frac{103}{12} + frac{13}{24} = frac{103 times 2}{12 times 2} + frac{13}{24} = frac{206}{24} + frac{13}{24} = frac{219}{24} = 9 frac{1}{8}$

Ответ: 9 1/8