Question

Calcule:

a) 3/5-2/3-1/2=

b) 6/5-1/10+3/10=

c) 1/2-3/4-4/3=

d) -1/7-2/5=

e) 4/3+1/5+2/7=

Answer 1

A) 3/5-2/3-1/2 mmc de 5 ; 3 e 2 = 30
18-20-15/30 = -17/30

B) 6/5-1/10+3/10. MMC de 5 ; 10 e 10 = 10
12-1+3/10 = 14/10 (simplifica por 2) = 7/5

C) 1/2-3/4-4/3. MMC de de 2;4 e 3 = 12
6-9-16/12 = 18/12 (simplifica por 2) = 9

D) -1/7-2/5 MMC de 7 e 5 = 35
-5-14/35 = -19/35

E) 4/3+1/5+2/7 MMC de 3;5 e 7 = 105
140+121+30/105 = 191/105