Question

Помогите решить,по действиям,ОЧЕНЬ СРОЧНО

Answer 1

Ответ:

Пошаговое объяснение:

б) Ответ: 3 3/5

1) 6 - 2 4/5 = 3 1/5

2) 3 1/5 * 3 1/8 = 16/5 * 25/8 = 10

3) 1 3/5 : 1/4 = 8/5 * 4/1 = 32/5 = 6 2/5

4) 10 - 6 2/5 = 3 3/5

г) Ответ: 11 7/20

1) 2 1/2 + 1 3/4 = 2 2/4 + 1 3/4 = 3 5/4 = 4 1/4

2) 6 1/2 + 4 4/5 = 6 5/10 + 4 8/10 = 10 13/10 = 11 3/10

3) 4 * 4 1/4 = 4 * 17/4 = 17

4) 11 3/10 : 2 = 113/10 * 1/2 = 113/20 = 5 13/20

5) 17 - 5 13/20 = 11 7/20

Answer 2

Пошаговое объяснение:

9) Б) $(6-2\frac{4}{5})*3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}=3\frac{3}{5}$

 

        1) $6-2\frac{4}{5}=\frac{6}{1}-\frac{14}{5}=\frac{30-14}{5}=\frac{16}{5};$

        2) $\frac{16}{5}*3\frac{1}{8}=\frac{16}{5}*\frac{25}{8} }=\frac{16*25}{5*8}=\frac{10}{1}=10;$

        3) $1\frac{3}{5}:\frac{1}{4}=\frac{8}{5}:\frac{1}{4}=\frac{8}{5}*\frac{4}{1}=\frac{32}{5};$

        4) $10-\frac{32}{5}=\frac{10}{1}-\frac{32}{5}=\frac{50-32}{5}=\frac{18}{5}=3\frac{3}{5};$

    Г) $4*(2\frac{1}{2}+1\frac{3}{4})-(6\frac{2}{4}+4\frac{4}{5}):2=-\frac{28}{5}=-5\frac{3}{5}$

        1) $2\frac{1}{2}+1\frac{3}{4}=\frac{5}{2}+\frac{7}{4}=\frac{10+7}{4}=\frac{17}{4};$

        2) $6\frac{2}{4}+4\frac{4}{5}=6\frac{1}{2}+4\frac{4}{5}=\frac{13}{2}+\frac{24}{5}=\frac{65+48}{10}=\frac{113}{10};$

        3) $4*\frac{17}{4}=\frac{4*17}{4}=\frac{17}{1}=17;$

        4) $\frac{113}{10}:2=\frac{113}{10}*\frac{2}{1}=\frac{113*2}{10}=\frac{113}{5};$

        5) $17-\frac{113}{5}=\frac{17}{1}-\frac{113}{5}=\frac{85-113}{5}=-\frac{28}{5}=-5\frac{3}{5}$