| 直接写得数: 108-99=________; | 7.45-1.05=________; | 1.03+0.07=________; | 9.8÷98=________; |
| 0.125×21×8=________; | 1- =________; | - =________; | × =________; |
+ =________; | ÷ =________. |


1
分析:0.125×21×8运用乘法交换律简算;
-
先通分,再相减;其它题目根据运算法则直接计算.解答:
| 解:108-99=9; | 7.45-1.05=6.4; | 1.03+0.07=1.1; | 9.8÷98=0.1; |
| 0.125×21×8=21; | 1- = ; | - = ; | × = ; |
+ =1; | ÷ = . |
,
,
,1,
.点评:本题考查了基本的计算,计算时要细心,注意把结果化成最简分数.
=________;
×
=________;
=________;
=________.