Question

Como calcular:
a)-0,3+0,2-3/5

b)-4/3+5/9-1+1/6

c)-1+1/3+1/6

Answer 1

a) $-0.3+0.2-\frac{3}{5}$
$=-\frac{3}{5}-0.1$
$=-0.6-0.1$
$=-0.7$

b)$-\frac{4}{3}+\frac{5}{9}-1+\frac{1}{6}$
$=-\frac{1}{1}-\frac{4}{3}+\frac{5}{9}+\frac{1}{6}$
$=-\frac{18}{18}-\frac{4\cdot \:6}{18}+\frac{5\cdot \:2}{18}+\frac{3}{18}$
$=\frac{-18-4\cdot \:6+2\cdot \:5+3}{18}$
$-18-4\cdot \:6+2\cdot \:5+3=-29$
$=\frac{-29}{18}$

c)$-1+\frac{1}{3}+\frac{1}{6}$
$=-\frac{1}{1}+\frac{1}{3}+\frac{1}{6}$
$=-\frac{6}{6}+\frac{2}{6}+\frac{1}{6}$
$=\frac{-6+2+1}{6}$
$=\frac{-3}{6}$
$=-\frac{1}{2}$

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http://brainly.com.br/tarefa/7457295

Answer 2

=-0,3+0,2 -(3/5)
=-0,1 - 3/5
=-0,1 - 0,6
= -0,7

b)(-4/3)+(5/9)-1+(1/6)
= -1,33 + 0,55 - 1+0,16
= 1,04

c)-1+(1/3)+(1/6)
= -1 +0,33 +0,16
= 0,51