| 直接写出得数: 4800÷240=________; | 25×12=________; | 16.5÷10%=________; |
+ =________; | 1- + =________; | 1.02-0.43=________; |
14÷ =________; | 0.32=________; | × =________; |
×2÷ ×2=________. |

0.59490.09
4分析:本题根据整数,小数,分数的加法、减法、乘法、除法的计算法则计算即可.
25×12可将12拆分为4×3进行计算;
×2÷
×2可以根据乘法交换律进行简便计算.解答:
| 4800÷240=20; | 25×12=300; | 16.5÷10%=165; |
+ = ; | 1- + = ; | 1.02-0.43=0.59; |
14÷ =49; | 0.32=0.09; | × = ; |
×2÷ ×2=4.故答案为:20,300,165, , ,0.59,49,0.09, ,4. |
点评:完成本题要注意1-
+
不适用加法结合律.
+
=________;
×