Question

4- Efetue as subtrações:
a) 2/15 - (-1/6) =
b) 3/2 - ( +5/4) =
c) 5- (-3/7) =​

Answer 1

Resposta:

a) 2/15 - (-1/6) =

$\frac{2}{15} + \frac{1}{6} \\ \\ \frac{4 + 5}{30} \\ \\ \frac{9}{30} \div (3) \\ \\ \frac{3}{10}$

b) 3/2 - ( +5/4) =

$\frac{3}{2} - \frac{5}{4} \\ \\ \frac{6 - 5}{4} \\ \\ = \frac{1}{4}$

c) 5- (-3/7) =

$5 + \frac{3}{7} \\ \\ \frac{35 + 3}{7} \\ \\ = \frac{38}{7}$