题目内容
直接写出得数.
= | 2.1×99= | 14= | 0.25= | = |
= | 6.3+2.75= | 5-1= | 2= | = |
解:=, | 2.1×99=207.9, | 14=4, | 0.25=1, | =, |
=, | 6.3+2.75=9.05, | 5-1=3, | 2=3, | =. |
分析:根据分数和小数加减法的计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
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题目内容
= | 2.1×99= | 14= | 0.25= | = |
= | 6.3+2.75= | 5-1= | 2= | = |
解:=, | 2.1×99=207.9, | 14=4, | 0.25=1, | =, |
=, | 6.3+2.75=9.05, | 5-1=3, | 2=3, | =. |