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口算
0.5×5=0.2-0.2=6.5÷100=0.61÷10=
1.25×8=4.85×0=0.08×0.9=1000×3.08=
9.5+0.52=4.8-2.5=7.3×100=6.7-4.5=
0.24÷4=5.2÷4=1.5×0.04=0.45÷9=

解:
0.5×5=2.50.2-0.2=06.5÷100=0.0650.61÷10=0.061
1.25×8=104.85×0=00.08×0.9=0.0721000×3.08=3080
9.5+0.52=10.024.8-2.5=2.37.3×100=7306.7-4.5=2.2
0.24÷4=0.065.2÷4=1.31.5×0.04=0.060.45÷9=0.05

分析:依据小数乘法、除法、加法、减法的计算方法直接计算即可.
点评:本题主要考查学生运用小数乘、除法及小数加、减法的计算法则解决问题的能力.
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