Question

Calcule e apresente o resultado na forma de numero decimala)8+1/2b)2,4-3/10c)0,4+1/2+0,6d)1,3+1/4+7/4

Answer 1

a)8+1/2
$8+ \frac{1}{2} = \frac{16+1}{2}= \frac{17}{2}=8,5$

b)2/4-3/10
$\frac{2}{4} - \frac{3}{10}= \frac{2x5-3x2}{20} = \frac{10-6}{20} = \frac{4}{20}= \frac{1}{5}= 0,2$

c)0,4+1/2+0,6
$0,4+ \frac{1}{2}+0,6=0,4+0,5+0,6=1,5$

d)1,3+1/4+7/4
$1,3+\frac{1}{4} + \frac{7}{4}=1,3+ \frac{1+7}{4} = 1,3+\frac{8}{4} = 1,3+2=3,3$