Question

Resolva as seguintes operações
A) 1/7+2/14+21/7
B) 25/100+12/20
C) 1/2-1/4

Answer 1

a)
$\frac{1}{7} + \frac{2}{14} + \frac{21}{7} = \frac{2+2+42}{14}= \frac{48}{14} = \frac{24}{7}$

b)
$\frac{25}{100} + \frac{12}{20} = \frac{25+60}{100} = \frac{85}{100} = \frac{17}{20}$

c)
$\frac{1}{2} - \frac{1}{4} = \frac{2-1}{4} = \frac{1}{4}$