Question

a)5/9-10/12= b)(-0,3).(-5/8)= c)(+2/3).(-1/2).(-3/7)= d)(2/5).(-3/4-1/2)= e)(-3/5):(-8/5)= f)(3/5):(3/4)=

Answer 1

a)5/9-10/12=
MMC de 9 e 12 = 36
20/36 - 30/36
-10/36

b)(-0,3).(-5/8)=
+1,5/8
15/80 (simplificar por 5)
3/16

c)(+2/3).(-1/2).(-3/7)=
2/3 * 3/14=
6/42 (simplificar por 6)
1/7

d)(2/5).(-3/4-1/2)=
MMC de 2 e 4 = 4
2/5 * (-3/4 - 2/4)
2/5 * (-5/4)
-10/20 (simplificar por 10)
-1/2

e)(-3/5):(-8/5)=
-3/5 * (-5/8)=
15/40 (simplificar por 5)
3/8

f)(3/5):(3/4)=
3/5 * 4/3
12/15 (simplificar por 3)
4/5