Question

Номер 328 выполните действие и упростите результат ( N 328-329 ) a) 1/8 + 1/8 в) 2/9 + 1/9 д) 7/15 - 4/15 Номер 329 а) 5/9 +x =8/9 г) x- 7/20 =3/20

Answer 1

Номер 328:

а)

$\displaystyle \tt \frac{1}{8}+\frac{1}{8}=\frac{2}{8}=\frac{1}{4}=0,25$

в)

$\displaystyle \tt \frac{2}{9}+\frac{1}{9}=\frac{3}{9}=\frac{1}{3}$

д)

$\displaystyle \tt \frac{7}{15}-\frac{4}{15}=\frac{3}{15}=\frac{1}{5}=0,2$

Номер 329:

а)

$\displaystyle \tt \frac{5}{9}+x=\frac{8}{9}\\x=\frac{8}{9}-\frac{5}{9}\\x=\frac{3}{9}\\x=\frac{1}{3}$

г)

$\displaystyle \tt x-\frac{7}{20}=\frac{3}{20}\\x=\frac{3}{20}+\frac{7}{20}\\x=\frac{10}{20}\\x=\frac{1}{2}\\x=0,5$

Answer 2

Ответ:

Пошаговое объяснение:

Answer 3

Номер 328: a) 1/8 + 1/8 = 1/8 + 1/8 = 2/8 = 1/4

в) 2/9 + 1/9 = 2/9 + 1/9 = 3/9 = 1/3

д) 7/15 - 4/15 = (7 - 4)/15 = 3/15 = 1/5

Номер 329: а) 5/9 + x = 8/9

To solve this equation, we can subtract 5/9 from both sides:

5/9 + x - 5/9 = 8/9 - 5/9

x = 3/9

Now we can simplify 3/9:

x = 1/3

г) x - 7/20 = 3/20

To solve this equation, we can add 7/20 to both sides:

x - 7/20 + 7/20 = 3/20 + 7/20

x = 10/20

Now we can simplify 10/20:

x = 1/2