Question

escubra o valor das expressões abaixo.

Me ajudem por favor...☆​

Answer 1

Explicação passo-a-passo:

a) 5/8 + 1/2 . 3/4

5/8 + 3/8 = 8/8 = 1

b) 5 - 7/4 . 1/2

5 - 7/8 mmc = 8

40/8 - 7/8 = 33/8

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

2/15 + 9/4 mmc 15 4 l 2

8/60 + 135/60 = 143/60 15 2 l 2

15 1 l 3

5 1 l 5

1 1 60

d) 3/5 + 2/9 : 2/3

3/5 + 2/9 . 3/2

3/5 + 6/18

3/5 + 1/3 mmc = 15

9/15 + 5/15 = 14/15

e) 2/7 . 3/5 - 1/8 : 5/6

6/35 - 1/8 . 6/5

6/35 - 6/40 mmc 35 40 l 2

48/280 - 42/280 35 20 l 2

6/280 :(2) = 3/140 35 10 l 2

35 5 l 5

7 1 l 7

1 1 280

f) 3/4 + 5/9 : 1/6

3/4 + 5/9 . 6/1

3/4 + 30/9

3/4 + 10/3 mmc = 12

9/12 + 40/12 = 49/12