Question

calcule:
a) 2/11 + 5/11 -3/11
b) 2/7 - 4/7 - 9/7
c) 1/2 - 1/3 + 1/4 - 1/5
d) 2/5 + 3/8 - 1/20
e) 2 - 9/5 - 2/8
f) 9/16 - 1/4 - 5/9
g) 5/4 . 2/9
h) 1/2 . 2/3 . 3/4​

Answer 1

Resposta:

a) 2/11 + 5/11 -3/11 = 4/11

b) 2/7 - 4/7 - 9/7 = -11/7

c) 1/2 - 1/3 + 1/4 - 1/5 = 13/60

d) 2/5 + 3/8 - 1/20 = 29/40

e)  2 - 9/5 - 2/8= -1/20

f) 9/16 - 1/4 - 5/9 = -35/144

g) 5/4 . 2/9 = 5/18

h) 1/2 . 2/3 . 3/4​ = 1/4

Explicação passo-a-passo:

a) 2/11 + 5/11 -3/11

2 + 5-3

   11

4

11

b) 2/7 - 4/7 - 9/7

2 - 4-9 = -11/7

c) 1/2 - 1/3 + 1/4 - 1/5

MMC dos denominadores

30-20+15-12

     60

13/60

d) 2/5 + 3/8 - 1/20

MMC dos denominadores

16+15-2

   40

29/40

e) 2 - 9/5 - 2/8

2- 9/5 -1/4

MMC dos denominadores

40-36-5

     20

-1/20

f) 9/16 - 1/4 - 5/9

MMC dos denominadores

81-36-80

    144

-35/144

g) 5/4 . 2/9

Simplifique o 4 e 2 pelo MDC

5/2 × 1/9 = 5/18

h) 1/2 . 2/3 . 3/4​

simplifique os números 2 pelo MDC 2

1/3 × 3/4 = 1/4