Question

Calcule e simplifiquemos resultados quando for possível a)1/2-1/3 b)5/6-1/3 c) 4/5-2/7 d)7/8-1/6 e) 5/4 -1/2 f)8/10-1/5

Answer 1

1. Colocar as frações sob o mesmo denominador (MMC)
2. Operar
3. Simplificar

a) MMC(2,3)= 6   $\frac{1}{2} - \frac{1}{3} = \frac{3-2}{6} = \frac{1}{6}$  

b) MMC()6,3= 6  $\frac{5}{6} + \frac{1}{3} = \frac{5-2}{6} = \frac{3}{6} = \frac{1}{2}$

c) MMC(5,7)= 35  $\frac{4}{5} - \frac{2}{7} = \frac{28-10}{35} = \frac{10}{35} = \frac{2}{7}$

d) MMC(8,6)= 24  $\frac{7}{8} - \frac{1}{6} = \frac{21-4}{24} = \frac{17}{24}$

e) MMC(4,2)= 4  $\frac{5}{4} - \frac{1}{2} = \frac{5-2}{4} = \frac{3}{4}$

f)  MMC(10,5)= 10  $\frac{8}{10} - \frac{1}{5} = \frac{8-2}{10} = \frac{6}{10} = \frac{2}{5}$