`Đáp` `án`:
`a)` ${9548}$
`b)` ${18802}$
`Giải` `thích` `các` `bước` `giải`:
`a)` ${1588}$ + ${6784}$ + ${56}$ - ${79}$ + ${487}$ + ${89}$ * ${8}$
= ${1588}$ + ${6784}$ + ${56}$ - ${79}$ + ${487}$ + ${712}$
= ${8372}$ + ${56}$ - ${79}$ + ${487}$ + ${712}$
= ${8428}$ - ${79}$ + ${487}$ + ${712}$
= ${8349}$ + ${487}$ + ${712}$
= ${8836}$ + ${712}$
= ${9548}$
`b)` ${23763}$ - ${5865}$ + ${595}$ + ${909}$ : ${9}$ + ${208}$
= ${23763}$ - ${5865}$ + ${595}$ + ${101}$ + ${208}$
= ${17898}$ + ${595}$ + ${101}$ + ${208}$
= ${18493}$ + ${101}$ + ${208}$
= ${18594}$ + ${208}$
= ${18802}$
`Chúc` `bạn` `học` `tốt`