a, `24 . 46 + 24 . 54 - 100`
`= 24 . ( 46 + 54 ) - 100`
`= 24 . 100 - 100`
`= 2400 - 100`
`= 2300`
b, `1993 + 238`
`= 1993 + 231 + 7`
`= ( 1993 + 7 ) + 231
`= 2000 + 231`
`= 2231`
c, `58 . 75 + 58 . 50 - 58 . 25` ( mình sửa dấu )
`= 58 . ( 75 + 50 - 25 )`
`= 58 . 100`
`= 5800`
d, `316 - 97`
`= 316 - 16 - 81`
`= 300 - 81`
`= 219`
e, `276 : 23`
`= 23 . 12 : 23`
`= 12`