Question

resolva as seguintes contas de fração com mmc

5/17+9/17=

5/9+4/9=

9/10+1/10+3/10=

18/4 +3/5+ 4/2=

2/9+3/4=
​

Answer 1

a)

$\mathsf{\dfrac{5}{17}+\dfrac{9}{17}=\dfrac{14}{17}}$

b)

$\mathsf{\dfrac{5}{9}+\dfrac{4}{9}=\dfrac{9}{9}=1}$

c)

$\mathsf{\dfrac{9}{10}+\dfrac{1}{10}+\dfrac{3}{10}=\dfrac{13}{10}}$

d)

$\mathsf{\dfrac{18}{4}+\dfrac{3}{5}+\dfrac{4}{2}=\dfrac{90+12+40}{20}=dfrac{142\div2}{20\div2}=\dfrac{71}{10}}$

e)

$\mathsf{\dfrac{2}{9}+\dfrac{3}{4}=\dfrac{8+27}{36}=\dfrac{35}{36}}$