Question

Calcule a) 3/4 - 1/2. B) 3/8 +3/2. C) 3/5 + 3/4 + 3/10. D)8/5 - 1/4 - 3/10. n sei fazer

Answer 1

a)vc vai fazer MMC de 4 e 2 = 4
3/4-2/4=1/4
b)MMC de 8 e 2 = 8 
3/8+12/8=15/8
c)MMC de 5 ,4  e 10 = 20
12/20+15/20+6/20=33/20
d)MMC de 4 e 10 = 20 
5/20-6/20=-1/20