| 直接写出得数. 1÷ =________; | 0÷ =________; | + ×0=________; |
| 1÷0.1=________; | 432-198=________; | 1000-273-627=________; |
| 1.9×1.25×8=________; | ÷ ÷ =________; | 0.1×0.1÷0.1×0.1=________; |
| 0.77×99+0.77=________. |
1023410019
0.0177分析:本题根据四则混合运算的顺序计算即可,先算乘除,再算加减,有括号的再算括号里面的.
解答:
| 解: 1÷ =7; | 0÷ =0 | + ×0= ; |
| 1÷0.1=10; | 432-198=234; | 1000-273-627=100; |
| 1.9×1.25×8=19; | ÷ ÷ = ; | 0.1×0.1÷0.1×0.1=0.01; |
| 0.77×99+0.77=77; |
,10,234,100,19,
,0.01,77.点评:在进行四则混合运算时,要注意分析式中数据,尽量用简便方法计算.
=________;
=________;
×0=________;
÷
÷
=________;