Question

2) Efetue as frações abaixo:
a) 2/5 + 1/8 + 3/4=
c) 6.3/4
b) 5/12 - 1/4=
d) 3/8: 6=​

Answer 1

Explicação passo-a-passo:

$a)\frac{2}{5} +\frac{1}{8} +\frac{3}{4}$

mmc=40

$\frac{16+5+30}{40} =\frac{51}{40}$

$b)6.\frac{3}{4} =\frac{6.3}{4}=\frac{18}{4}=\frac{9}{2}$

$c)\frac{5}{12}-\frac{1}{4}$

Igualar os denominadores:

$\frac{5}{12} -\frac{3}{12}=\frac{5-3}{12}=\frac{2}{12}=\frac{1}{6}$

$d)\frac{3}{8}:6=\frac{3}{8}.\frac{1}{6}=\frac{3.1}{8.6}=\frac{3}{48}=\frac{1}{16}$