【1】8.8÷0.25
=8.8x4÷(0.25x4)
=35.2÷1
=35.2
【2】999.9+99.9+9.9+0.9+0.4
=999.9+0.1+99.9+0.1+9.9+0.1+0.9+0.1
=1000+100+10+1
=1111
【3】22.75-【六又五分之二÷3.2×二又三分之一+0.25】
=22.75-32/5÷16/5x7/3-0.25
=22.5-14/3
=45/2-14/3
=135/6-28/6
=107/6
如果本题有什么不明白可以追问,
【1】8.8÷0.25
=8.8x4÷(0.25x4)
=35.2÷1
=35.2
【2】999.9+99.9+9.9+0.9+0.4
=999.9+0.1+99.9+0.1+9.9+0.1+0.9+0.1
=1000+100+10+1
=1111
【3】22.75-【六又五分之二÷3.2×二又三分之一+0.25】
=22.75-32/5÷16/5x7/3-0.25
=22.5-14/3
=45/2-14/3
=135/6-28/6
=107/6
如果本题有什么不明白可以追问,