Question

hola me ayudan con esta fraccion?
3 7/2 - 5 9/4 - 5/4 + 2/5=​

Answer 1

Respuesta:

218/20

Explicación paso a paso:

3 7/2

= 3 + 7/2

= 6/2 + 7/2

= ( 6 + 7 ) / 2

= 13/2

5 9/4

= 5 + 9/4

= 20/4 + 9/4

= ( 20 + 9 ) / 4

= 29/4

3 7/2 - 5 9/4 - 5/4 + 2/5

= 3 7/2 + 2/5 - 5 9/4 - 5/4

= 3 7/2 + 2/5 - 29/4 - 13/4

= 3 7/2 + 2/5 - ( 29 - 13 )/4

= 3 7/2 + 2/5 - 16/4

3 7/2

= 13/2

= ( 13 / 2 ) x ( 10 / 10 )

= ( 13 x 10 ) / ( 10 x 2 )

= 130/20

2/5

= ( 2 / 5 ) x ( 4 / 4 )

= ( 2 x 4 ) / ( 5 x 4 )

= 8/20

16/4

= ( 16 / 4 ) x ( 5 / 5 )

= ( 16 x 5 ) / ( 4 x 5 )

= 80 / 20

3 7/2 + 2/5 - 16/4

= 130/20 + 8/20 + 80/20

= ( 130 + 8 + 80 )/20

= 218/20