Question

Обчисліть.(Не забудь звести дроби до однакового знаменника)
1)5/12-3/8
2)13/18-5/27
3)7/30+(1/4+1/5)
4)3/10-3 7/15​

Answer 1

Ответ:

Пошаговое объяснение:

1)5/12-3/8 = 10/24 - 9/24 = 1/24

2)13/18-5/27 = 39/54 - 10/54 = 29/54

3)7/30+(1/4+1/5) = 14/60 + 15/60 + 12/60 = 41/60

4) 3/10-3 7/15​ = 9/30 - 3 14/30 = -3 5/30 = -3 1/6

Answer 2

Решение:

$1) \frac{5}{12} - \frac{3}{8} = \frac{10}{24} - \frac{9}{24} = \frac{1}{24}$

$2) \frac{13}{18} - \frac{5}{27} = \frac{39}{54} - \frac{10}{54} = \frac{29}{54}$

$3) \frac{7}{30} + ( \frac{1}{4} + \frac{1}{5} ) = \frac{14}{60} + \frac{15}{60} + \frac{12}{60} = \frac{41}{60}$

$4) \frac{3}{10} - 3 \frac{7}{15} = \frac{9}{30} - 3 \frac{14}{30} = - 3 \frac{5}{30} = - 3 \frac{1}{6}$