Question

Выполните вычитание 1/10-1/12 и 9/20-1/30

Answer 1

1/10-1/12 = $\frac{1}{10} -\frac{1}{12}}= \frac{12-10}{120} = \frac{2}{120}=\frac{1}{60} \\ \frac{9}{20} -\frac{1}{30}}= \frac{9*30-20}{600} = \frac{270-20}{600}=\frac{250}{600}= \frac{5}{12}$

Answer 2

Я решила так::1/60 и 5/12