Question

8/15· 7,5+( - 1/4 +1)
3,5 : 5/28 - (7/8 - 1 )
- 7,5 :одна целая7/8 - (-1+3/4)
помогите решить плиз

Answer 1

1)
$1. \ frac{8}{15} times frac{75}{10} = 4 times frac{5}{5} = 4$
$2. frac{ - 1}{4} + 1 = - frac{1}{4 } + frac{4}{4} = frac{3}{4}$
$3)4 + frac{3}{4} = 4 frac{3}{4}$
2)3,5:5/28-(7/8-1)=19 целых 29/40


$frac{7}{8} - 1 = frac{7}{8} - frac{8}{8} = - frac{1}{8}$
$frac{35}{10} div frac{5}{28} = frac{35}{10} times frac{28}{5} = frac{7}{5} times 14 = frac{98}{5} = 19 frac{3}{5} =19.6$
$frac{98}{5} = 19 frac{3}{5} = 19.6$
$19 frac{3}{5} - ( - frac{1}{8}) = 19 frac{24}{40} + frac{5}{40} = 19 frac{29}{40}$
3)7,5:1 7/8-(-1+3/4)=4 целых 1/4
$-1 + frac{3}{4} = - frac{4}{4} + frac{3}{4} = - frac{1}{4}$
$frac{75}{10} div frac{15}{8} = frac{75}{10} times frac{8}{15} = frac{5}{5} times 4 = frac{20}{5} = 4$
20/5=4
$4 - ( - frac{1}{4}) = 4 + frac{1}{4} = 4 frac{1}{4}$