Question

Me pueden ayudar con estos de aqui también por favor ​

Answer 1

Respuesta:

12. 1

13. 23 / 6

14. 3 / 2

15. 2 / 31

Explicación paso a paso:

12.

( 3 / 2 + 1 / 2 )

= ( 3 + 1 ) / 2

= 4 / 2

= 2

( 1 / 3 + 2 /3 )

= ( 1 + 2 ) / 3

= 3 / 3

= 1

( 3 / 2 + 1 / 2 ) ÷ ( 1 / 3 + 2 / 3 )

= 2 ÷ 1

= 2 / 1

= 2

13.

1 / 2 / 5

= 1 x 5 / 2

= 5 / 2

1 / 1 / 4

= 1 x 4 / 1

= 4

3 / 1 / 6

= 3 x 6 / 1

= 18

LCM = 2

1 / 1 / 4

= 4

= 4 x 2 / 2

= 8 / 2

3 / 1 / 6

= 18

= 18 x 2 / 2

= 36 / 2

( 1 / 2 / 5 ) + ( 1 / 1 / 4 ) - ( 3 / 1 / 6 )

= ( 5 / 2 ) + ( 8 / 2 ) - ( 36 / 2 )

= ( 5 + 8 - 36 ) / 6

= ( 13 - 36 ) / 6

= 23 / 6

14.

( 3 / 2 - 1 / 4 )

= ( ( 3 x 2 / 2 x 2 ) - 1 / 4 )

= ( 6 / 4 - 1 / 4 )

= ( 6 - 1 ) / 4

= 5 / 4

( 1 / 3 + 1 / 2 )

= 2 / 6 + 3 / 6

= ( 2 + 3 ) / 6

= 5 / 6

( 3 / 2 - 1 / 4 ) ÷ ( 1 / 3 + 1 / 2 )

= ( 5 / 4 ) ÷ ( 5 / 6 )

= ( 5 / 4 ) x ( 6 / 5 )

= ( 5 x 6 ) / ( 4 x 5 )

= 6 / 4

= 3 / 2

15.

1 / 1 / 4

= 1 x 4 / 1

= 4

1 - 1 / 2

= 2 / 2 - 1 / 2

= ( 2 - 1 ) / 2

= 1 / 2

1 / ( 1 - 1 / 2 )

= 1 / 1 / 2

= 1 x 2 / 1

= 2

( 1 / 1 / 4 - 1 / ( 1 - 1 / 2 ) )

= 4 - 2

= 2

3 / 1 / 7

= 3 x 7 / 1

= 21

2 / 1 / 5

= 2 x 5 / 1

= 10

( 3 / 1 / 7 ) + ( 2 / 1 / 5 )

= 21 + 10

= 31

2 ÷ 31

= 2 / 31