Question

Obs: números inteiros relativos

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

b) 4 - $\frac{1}{10}$ + $\frac{2}{5}$ =

c) $\frac{1}{2}$ - $( -\frac{3}{5})$ + $\frac{7}{10}$ =

d) -2 - $(- \frac{1}{2})$ - $\frac{1}{8}$ =

e) $\frac{5}{12}$ + $(-\frac{1}{4})$ - $(+\frac{1}{6})$ =

P.s: Agradeço de coração desde já!

Answer 1

a) 3/5 - 1 - 2/5 

3/5 - 5/5 - 2/5 

-2/5-2/5 = - 4/5 

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b) 4 -1/10 + 2/5

40/10 - 1/10 + 4/10 

39/10 + 4/10 

35/10 = 7/2 

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c)1/2-(-3/5) + 7/10 

1/2 + 3/5 + 7/10 

5/10 + 6/10 + 7/10 

11/10 + 7/10 

18/10 = 9/5 

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d) -2 - (-1/2) - 1/8

-2 + 1/2 - 1/8 

-16/8 + 4/8 - 1/8 

- 12/8 - 1/8 = - 13/8 

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e) 5/12 + (-1/4) - (1/6) 

5/12 - 1/4 - 1/6 

5/12 - 3/12 - 6/12 

2/12 - 6/12 

- 4/12 = - 1/3