Question

1)calcule

a)1/4 -3/4-3/2-1/2 =
b)3/4:2/3:9/12=
c)1/2+(0,3)+1/6=
d)0,2+3/4-5/2=

por favor me ajudem
(/ é fraçao)

Answer 1

Oi...

a)

1/4 - 3/4 - 3/2  -1/2

1 - 3/4 + - 3 - 1/2

- 2/4 + (- 4/2)

- 1/2 + (- 4/2)

- 1/2 - 4/2⇒mmc = 2

- 1 - 4/2

- 5/2

b)

3/4 : 2/3 : 9/12

3/4 × 3/2 × 12/9

3/2 × 3/3

9/6 ÷ 3

3/2

c)

1/2 + (0,3) + 1/6

1/2 + 3/10 + 1/6⇒mmc = 30

15 + 9 + 5/30

29/30

d)

0,2+ 3/4 - 5/2

2/10 + 3/4 - 5/2

1/5 + 3/4  5/2⇒mmc = 20

4 + 15 - 50/20

19 -50/20

- 31/20

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