Sbvsjsnss như djejeu

`a) ( 1/2 + 3/4 ) xx 4 `

`= ( 2/4 + 3/4 ) xx 4`

`= 5/4 xx 4`

`= 5`

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`b) ( 5/7 - 1/14 ) xx 7`

`= ( 10/14 - 1/14 ) xx 7`

`= 9/14 xx 7`

`= 9/2`

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`c) 1/2 xx 3/4 + 1/2 xx 1/4`

`= 1/2 xx  ( 3/4 + 1/4 )`

`= 1/2 xx 1`

`= 1/2`

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`d )11/3 xx 26/7 - 26/7 xx 8/3`

`= 26/7 xx ( 11/3 - 8/3 )`

`= 26/7 xx 1`

`= 26/7`