Question

Efetue:

1/4+1/6=

3/25+2/5=

3/10+1/4=

4/5-2/3=

1.3/10-8/9=


Gente é pra agora pfvr ajuda.

Answer 1

Vamos lá

1/4+1/6 mmc = 12

3/12 + 2/12 = 5/12

3/25 + 2/5 mmc = 25

3/25 + 10/25 = 13/25

3/10+1/4 mmc = 20

6/20 + 5/20 = 11/20

4/5 - 2/3 mmc = 15

12/15 - 10/15 = 2/15

1.3/10-8/9 = 13/100 - 8/9 mmc = 900

117/900 - 800/900 = -683/900