| 576-500= | 12.7+7= | 15×6= | 30÷4= |
| 2.8×2= | 3.64+4.46= | 1÷0.05= | 1- = |
+ = | = | = | 92= |
= | 20×0.06= | = | 164-(84-60)= |
| 576-500=76, | 12.7+7=19.7, | 15×6=90, | 30÷4=7.5, |
| 2.8×2=5.6, | 3.64+4.46=8.1, | 1÷0.05=20, | 1- = , |
+ = , | = , | = , | 92=81, |
= , | 20×0.06=1.2, | = , | 164-(84-60)=140. |
分析:根据整数、小数和分数的加减乘除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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