Question

1) calcule 10/5 - 2/4

( ) 3/2
( ) 3/10
( ) 5/3
( ) 17/21

2) calcule 7/3 + 5/2:

( ) 3/2
( ) 3/10
( ) 29/6
( ) 17/21

3)calcule 4/3 + 2/6:

( ) 3/2
( ) 3/10
( ) 5/3
( ) 17/21

4) calcule 1/2 - 1/5:

( ) 3/2
( ) 3/10
( ) 5/3
( ) 17/21

5) calcule 1/7 + 2/)

( ) 3/2
( ) 3/10
( ) 5/3
( ) 17/21​

Answer 1

Resolução!

1 ) 10/5 - 2/4

= 10/5 - 2/4 _____ MMC = 20

= 40 - 10/20

= 30/20 ÷ 10

= 3/2

2 ) 7/3 + 5/2

= 7/3 + 5/2 _____ MMC = 6

= 14 + 15/6

= 29/6

3 ) 4/3 + 2/6

= 4/3 + 2/6 ____ MMC = 6

= 8 + 2/6

= 10/6 ÷ 2

= 5/3

4 ) 1/2 - 1/5

= 1/2 - 1/5 ____ MMC = 10

= 5 - 2/10

= 3/10

5 ) 1/7 + 2/?

Espero ter ajudado