| 口算. 46+34= | 72-28= | 800×5= | 5000+200= |
| 32×2= | 96÷3= | 80÷4= | 7700-700= |
| 64÷2= | 27+45= | 85-78= | 1400-600= |
+ = | - = | + = | - = |
| 46+34=80, | 72-28=44, | 800×5=4000, | 5000+200=5200, |
| 32×2=64, | 96÷3=32, | 80÷4=20, | 7700-700=7000, |
| 64÷2=32, | 27+45=72, | 85-78=7, | 1400-600=800, |
+ = , | - = , | + = , | - = . |
分析:本题根据整数、分数的加法、减法、乘法、除法的运算法则计算即可.
点评:完成本题要根据运算法则认真分析式中数的特点,然后快速准确得出答案.
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