1 . 把一根木头锯成2段要
分钟,照这样计算,如果把这根木头锯成6段,需要几分钟?
![](https://img.xkw.com/dksih/QBM/2018/10/14/2053303736033280/2055077395316736/STEM/dd5b060462ed4ad6a7a3fabfdbf215a2.png?resizew=8)
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2 . 1时24分= 时(填分数); 5.4吨= 千克.
您最近一年使用:0次
真题
3 . 看谁都能算对!(能简算的请写出简算过程)
624﹣3.2×1.5÷0.1 9.43+0.78﹣2.43
+(
+
)×![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/6776d1e2b66d41938c3b3bb17ef5174b.png)
×5+
÷![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/29b118cd149c44b2a07cb2adc707c0bb.png)
﹣[(
+
)÷
].
624﹣3.2×1.5÷0.1 9.43+0.78﹣2.43
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/0c0d3ac585b447bb883eab4e4b530d2d.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/76cb6d04faf644d3b47e3f9eb2676e8c.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/0c0d3ac585b447bb883eab4e4b530d2d.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/6776d1e2b66d41938c3b3bb17ef5174b.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/d5afe96f75f945228b6f357a8e129ee8.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/5aceda08960e4090b0264835f8ce30e3.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/29b118cd149c44b2a07cb2adc707c0bb.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/b0404675a417489190ad1e8663e31deb.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/29b118cd149c44b2a07cb2adc707c0bb.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/68eb437e23594c2782ada7bd6f2583cd.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129973760/STEM/08a8e40e2bf4444ea761ceca55a0731c.png)
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真题
4 . 用简便方法计算.
6×(
+
+
×
) 8.5×99+8.5
÷5+
×
.
6×(
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/7d8ebe7cc4104f1aa245b02cff950dc3.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/e94002753d91468eb16d9c00268c491f.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/c303c6b0bc38467b9a2ead754a365d89.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/a153f4c10274478298a1029dbe82ce8f.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/e94002753d91468eb16d9c00268c491f.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/c303c6b0bc38467b9a2ead754a365d89.png)
![](https://img.xkw.com/dksih/QBM/2014/9/23/1576493069795328/1576493129924608/STEM/a153f4c10274478298a1029dbe82ce8f.png)
您最近一年使用:0次