Question

calcule o valor das expressões A) 2/5+1/2-1/3
B) 3/4×5/6×1/2
C)2/3+1/4×3
D)3/4÷1/2-2/3
E)3/5+1/5÷1/10
F)2 1/2+3/2×1/2
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Answer 1

Olá...

a)

2/5 + 1/2 - 1/3 ⇒ mmc = 30

12 + 15 - 10/30

17/30

b)

3/4 × 5/6 × 1/2

1/4 × 5/2 × 1/2

5/16

c)

2/3 + 1/4 × 3

2/3 + 3/4⇒mmc = 12

8 + 9/12

17/12

d)

3/4 ÷ 1/2 - 2/3

3/4 × 2 - 2/3

3/2 - 2/3 ⇒ mmc = 6

9- 4/6

5/6

e)

3/5 + 1/5 ÷ 1/10

3/5 + 1/5 × 10

3/5 + 2⇒mmc = 5

3 + 10/5

13/5

f)

2 1/2 + 3/2 × 1/2

5/2 + 3/2 × 1/2

5/2 + 3/4⇒mmc = 4

10 + 3/4

13/4

Espero ter ajudado.