0.125+ = | + = | 1- = | - = |
+ = | 12.5×0.1= | + + = | 1- - = |
+ = | 9.8÷0.01= | 3.4+13= | 1.08+ = |
解:0.125+ =1, | + =![]() | 1- = , | - = , |
+ = , | 12.5×0.1=1.25, | + + =1 , | 1- - =0, |
+ = , | 9.8÷0.01=980, | 3.4+13=16.4, | 1.08+ =1.58. |
分析:本题根据小数、分数的加法、减法、乘法与除法的运算法则计算即可.
0.125+
可将0.125化成分数计算;
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+
可根据加法交换律计算;1.08+
可将式中分数化成小数计算.点评:完成有关于分数的计算时,要注意通分约分;完成有关于小数的计算时,要注意小数点位置的变化及小数点的对齐.
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