Question

Calcule os valores racionais de:
a) 2/5 + 1/6 - 1/2
b) 1+ 2/5 sobre 3- 1/5
c) 1/10 + 1/5
d) 3+1,4 - 0,5

Answer 1

a) 2/5 + 1/6 - 1/2
12/30 + 5/30 - 15/30
17/30 - 15/30
(2/30) :2
1/15

b) (1+2/5) / (3-1/5)
((5 + 2)/5) / (15-1)/5
(7/5) / (14/5)
(7/5) × (5/14)
1/2

c) 1/10 + 1/5
1/10 + 2/10
3/10

d) 3 + 1,4 - 0,5
4,4 - 0,5
3,9