1 . 计算下列各题,能简算的要简算。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c0ab4bb9d8b40e7d076ffc6ef0b04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbadb830b4503e80008fcf9441096737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c0ab4bb9d8b40e7d076ffc6ef0b04d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e0f056f160b5881f48ed65609bd6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c753628eb98ea2f7030fe3da07ba6.png)
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2 . 直接写出得数。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4957d1e7539f7bbffc6fc55b6c5e831f.png)
0.23= 0.42
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13408c6ed79ade275df2ddf165d55619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b37c500c1deb44c12498910c44f528c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f02d46ff3f9c2c5bff3576782f4aa33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4957d1e7539f7bbffc6fc55b6c5e831f.png)
0.23= 0.42
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f5ad9cc23a56d42746a29e34033831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993fef982ead3c014aa8e892a3003423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5866780715d3c3c781a9bfef1468aea3.png)
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3 .
的
是( ) ,0.8的倒数是( ) 。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fc07486f804358983a79746f8a9e41.png)
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4 . 一瞬间约
秒,也就是( ) 秒(填小数),一刹那约0.018秒,也就是( ) 秒(填分数)。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22bfb67763047ef36630b0390f2e76a.png)
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5 .
。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60efe41f3f7523e52c13f59173b140f5.png)
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6 . 下图中,直线上的点A表示( )。
A.1.22 | B.![]() | C.![]() |
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7 . 直接写得数。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec513abb3e14cd3e0940ff7bb41aff7.png)
47+38=
1-1÷9= 100-95=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d458741384fa99df2740180bb7802be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f26ebf6ef4c65897b18c6c7e129b1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598d616e5639763c16c74e4c2b32f11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec513abb3e14cd3e0940ff7bb41aff7.png)
47+38=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194fd6e83c729263c991a4f3b4bf7f38.png)
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8 .
。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57666180252a6f61f897e2111a2547dc.png)
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9 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa124c22517e2d77ca42fbbe38c797d.png)
= ÷12。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa124c22517e2d77ca42fbbe38c797d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fbb848bc9e00d19a6922c4216bb290.png)
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