通分并比较分数的大小和 和．
（1）﹣﹣（2）99×2.8 （3）5.125×+2.875÷4．
直接写出得数．= 15.2﹣0.9=50×0.01= 1÷0.1== 12÷35== == =
直接写出得数．708﹣99= 0.25×30= 1÷0.375= 2÷10%=+= ×2÷×2= 12﹣1.1= 0.63+0.25+0.37=
直接写出得数．14÷35= =0.77+0.33= =1.4﹣0.6= =5﹣1.4﹣1.6= =
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和
和
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+2.875÷4．
= 15.2﹣0.9=
= 12÷35=
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×2÷
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