Question

Determine o valor das expressões numéricas:
a)(1/3+1/4)+(2-1/2+1/6)?
b)(1/5+1/4):(1+1/8)?
c)2/3+(3/5-1/2):(1/5+1)?

Answer 1

a) (1/3+1/4)+(2-1/2+1/6)?

(4/12+3/12) + (2/1+1/2+1/6)

(7/12) + (12/6-3/6+1/6)

(7/12) + (10/6):2

7/12 + 5/3

1/12 + 20/12

21/12:3

7/4

b)(1/5+1/4):(1+1/8)?

(4/20+5/20):(1/1+1/8)

(9/20):(8/8+1/8)

(9/20):(9/8)

9/20 X 8/9

72/180: 2

36/90:2

18/45:3

6/15:3

2/5

c)2/3+(3/5-1/2):(1/5+1)?

2/3 + (6/10-5/10):(5/5+1/5)

2/3 + (1/10):(6/5)

2/3 + (1/10 X 5/6)

2/3 + (5/60:5=1/12)

2/3 + 1/12

4/12+1/12

5/12