| 2.3+3.57= | 199+65= | 0.8×0.9= | 3.2÷0.4= | 12×( × )= |
| 31×197≈ | 2- = | ÷ = | 0÷ + = | 9× ÷9× = |
| 解:直接写出得数. 2.3+3.57=5.87 | 199+65=264 | 0.8×0.9=0.72 | 3.2÷0.4=8 |
12×( × )=![]() | 31×197≈6000 | 2- =1![]() | ÷ =![]() |
0÷ + =![]() | 9× =![]() |
分析:按四则运算的运算顺序和计算法则计算即可.
点评:计算时要细心,同时注意运用定律进行简算.
编辑:chaxungu时间:2026-04-27 09:04:49分类:小学数学题库
| 2.3+3.57= | 199+65= | 0.8×0.9= | 3.2÷0.4= | 12×( × )= |
| 31×197≈ | 2- = | ÷ = | 0÷ + = | 9× ÷9× = |
| 解:直接写出得数. 2.3+3.57=5.87 | 199+65=264 | 0.8×0.9=0.72 | 3.2÷0.4=8 |
12×( × )=![]() | 31×197≈6000 | 2- =1![]() | ÷ =![]() |
0÷ + =![]() | 9× =![]() |