Làm chi tiết `: 7/2 - ( 1/2 + 1 1/3 ) xx 1/3`
`= 7/2 - ( 1/2 + 4/3 ) xx 1/3`
`= 7/2 - ( 3/6 + 8/6 )`
`= 7/2 - 11/6 xx 1/3`
`= 7/2 - 11/18`
`= 63/18 - 11/18`
`= 26/9`
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Làm ngắn gọn `: 7/2 - ( 1/2 + 1 1/3 ) xx 1/3`
`= 7/2 - ( 1/2 + 4/3 ) xx 1/3`
`= 7/2 - 11/6 xx 1/3`
`= 7/2 - 11/18`
`= 26/9`