Question

calcule,simplificando quando possível: A)4/7 + 2/7 B)5/8 - 7/8 C)4/5 - 2/3 D)5/4 + 4/5

Answer 1

Explicação passo-a-passo:

4/7+2/7=6/7

5/8-3/8=2/8÷2=1/4

4/5-2/3=12-10/15=2/15

5/4+4/5=25+16/20=31/20

Answer 2

Resposta:

A)

4/7 + 2/7 =

6/7

B)

5/8 - 7/8 =

2/8 : 2 =

1/4

C)

4/5 - 2/3 =

12 - 10

   15

2/15

D)

5/4 + 4/5 =

25 + 16 =

   20

31/20