Question

Resolva os cálculos
A)(-2/3)+(+1/4)=
B)(-4/7)+(-2/6)=
C)(+1/7)-(+1/3)=
D)(+2/3)-(+1/3)=
E)(-4/5)-(-1/8)=
F)(-3/4)-5=
Por favor me ajudem e pra agora

Answer 1

Olá...

a)

(- 2/3) + (+ 1/4)

- 2/3 + 1/4⇒mmc = 12

- 8 + 3/12

- 5/12

b)

(- 4/7) + (- 2/6)

- 4/7 - 2/6

- 4/7 - 1/3⇒mmc = 21

- (12 + 7)/12

- 19/21

c)

(+ 1/7) - (+ 1/3)

1/7 - 1/3⇒mmc = 21

3 - 7/21

- 4/21

d)

(+ 2/3) - (+ 1/3)

2/3 - 1/3⇒mmc = 3

2 - 1/3

1/3

e)

(- 4/5) - (- 1/8)

- 4/5 + 1/8⇒mmc = 40

-32 + 5/40

- 27/40

f)

(- 3/4) - 5

- 3/4 - 5⇒mmc = 4

- (3 + 20)/4

- 23/4

Boas lições.