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8÷8÷数学公式=数学公式+0.37=10-1数学公式1-9.9%            
1数学公式:2数学公式99099÷99       数学公式+数学公式×4300×0.3%
1%÷10%0.1×0.01÷0.1.

8÷8÷=8,+0.37=0.995,10-1=81-9.9%=0.901,
1:2=99099÷99=1001,+×4=1300×0.3%=0.9,
1%÷10%=0.1,0.1×0.01÷0.1=0.01.


分析:8÷8÷按照从左到右的顺序计算;+0.37先把分数化成小数,然后计算;1:2求比值用比的前项除以比的后项即可;+×4先算乘法,再算加法;
0.1×0.01÷0.1运用乘法结合律简算;其它题目根据运算法则直接求解.
点评:本题考查了基本的运算,计算时要细心,注意计算的准确率.
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180÷60=12×25=0÷90=
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0.1÷0.01×0.1=9.9+9.9×99=2.7×3.6+6.4×2.7=
720÷8÷9=2.9+5.7+2.1=2-0.16-0.64=
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