口算下面各题(10分)
2.5+3.2= 9.8-4.8= 1.29-0.18=
2.26+0.9= 8-0.82= 0.75+0.25=
1.4+0.5= 10.8-8.5= 6.4+1.07=
0.55+5.5= 1.05-0.09= 0.6+6.45=
4.13-1.8= 0.46+0.54= 1.07-0.47=
1.28+0.22= 2.4-1.9= 0.06+1.5=
2.5-0.9= 4.2+0.53=
下列各题怎样简便就怎样算.
﹣ ÷ +![]() |
× + ÷![]() |
( × ﹣ )÷![]() |
÷ + ÷![]() |
÷[ +(1﹣ )] |
( + ﹣ )×24 |
直接写出得数
6× = |
1﹣ = |
×4= |
÷15= |
× = |
× = |
÷ = |
÷ = |
4÷ = |
6× = |
计算下面各题,能简便的运用简便方法计算.
| 86.9+9.1÷(2.3﹣1.6) |
3.56﹣0.2+6.44﹣4.8 |
21.4﹣40.5÷7.5 |
| 8.52﹣(5.52+0.9) |
3.12+3.12×99 |
11÷[(0.4+0.04)×0.5] |
用竖式计算,减法题要验算,乘法题得数保留两位小数.
4.6﹣1.96
0.65×0.48
32.32÷16.
直接写得数
| 0.2﹣0.02= |
0.1÷0.05= |
4×0.5= |
0.26+0.74= |
12.5×0.8= |
| 8b﹣3b= |
0.52﹣0.2= |
4a×a= |
0.72÷0.9= |
14÷35= |