Question

Calcule: a) 4/9-(+2/3) b)7/5+(-5/3) c) -11/5+3 d)-7/20+1-11/15 - 1/6

Answer 1

Resposta:

Explicação passo-a-passo:

a) 4/9 - 2/3  =   mmc 9 e 3 = 9

   4/9 - 6/9 = - 2/9

----------------------------------------

b) 7/5+(-5/3)

   7/5 - 5/3 =            mmc 5 e 3 = 15

   21/15 - 25/15 = - 4/15

________________________

c) - 11/5 + 3/1    mmc 5 e 1 = 5

   - 11/5 + 15/5 = 4/5

----------------------------------------------

d )-7/20+1-11/15 - 1/6   mmc = 20,1,15,6 = 60

   -21/60+ 60/60 - 44/60 - 10/60 = - 75/60 + 60/60 = - 15/60= - 1/4

bons estudos