Question

Efetue as subtraçoes:

C) 8/10 - 1/5
D) 5/6 - 2/3
E) 4/3 - 1/2
F) 13/4 - 5/6
G) 7/8 - 1/6
H) 5/4 - 1/2

Answer 1

c)
$\frac{8}{10} - \frac{1}{5}= \frac{8}{10} - \frac{2}{10} = \frac{6}{10} = \frac{3}{5}$

d)
$\frac{5}{6} - \frac{2}{3} = \frac{5}{6} - \frac{4}{6} = \frac{1}{6}$

e)
$\frac{4}{3} - \frac{1}{2} = \frac{8}{6} - \frac{3}{6} = \frac{5}{6}$

f)
$\frac{13}{4} - \frac{5}{6} = \frac{39}{12} - \frac{10}{12} = \frac{29}{12}$

g)
$\frac{7}{8} - \frac{1}{6 } = \frac{21}{24} - \frac{4}{24} = \frac{17}{24}$

h)
$\frac{5}{4} - \frac{1}{2} = \frac{5}{4} - \frac{2}{4} = \frac{3}{4}$

Answer 2

c) 8/10 - 1/5 =                   mmc 10,5 = 10

8/10 - 2/10 = 6/10 simpl.     3/5

d) 5/6 - 2/3 =                        mmc 6 , 3 = 6

   5/6 - 4/6 = 1/6  

e)  4/3 - 1/2 =                          mmc 3, 2 = 6

   8 /6 - 3/6 = 5/6

f) 13/4 - 5/ 6 =                          mmc 4 ,6 = 12

 39/12 - 10/12 = 29/12

g) 7/8 - 1/6 =                                  mmc 8, 6 = 24

  21/24 - 4/24 = 17/24

h) 5/4 - 1/2 =                                 mmc 4,2 = 4

  5/4 - 2/4 = 3/4