1 . 计算下面各题.(能简算的要简算)
(1+
×
)÷75% 7.2×25%+2.8×
(1+
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293245958782976/2350738189680641/STEM/bd1e54197b974d1085943d2ac6f88fd7.png?resizew=7)
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293245958782976/2350738189680641/STEM/f9ce74adcfed44dbb909189303f2f092.png?resizew=7)
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293245958782976/2350738189680641/STEM/19a373bdbb2247018a929a42f697458f.png?resizew=7)
您最近一年使用:0次
2 . 解方程.
23%x=27.6 20%x+35%x=1.1
6+50%x=10 x-45%x=16.5
70%x-25%x=18.9 2x+
x=
23%x=27.6 20%x+35%x=1.1
6+50%x=10 x-45%x=16.5
70%x-25%x=18.9 2x+
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293245958782976/2350738189680640/STEM/03964aad036c4ab981466e3b336546af.png?resizew=7)
![](https://img.xkw.com/dksih/QBM/2019/9/18/2293245958782976/2350738189680640/STEM/6e6c143bd3204a81bd824acdbc285273.png?resizew=14)
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3 . 能简算的用简算.
25%×
+
×
-
÷4
-12.5%+25%÷
27÷[(19%-
)÷0.09]
25%×
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5756451881af4d6594c820652ebcc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954795d1842974a705f9468f3b952ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a27b7a4187707b0206a64cfdd1b05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503ca085e3ca5f2ba723b0dd66e210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca83504e351d7516f61a3052d7a31859.png)
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4 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73be557d3e1c43d4a8429db20fc06cd8.png)
您最近一年使用:0次
5 . 脱式计算.
(1)20
-2.73-8.27+1![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d326affa77104910e57ff03f133c7401.png)
(2)(
+
)÷
+
(1)20
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c0ecd44e562025f9016f24f81607ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d326affa77104910e57ff03f133c7401.png)
(2)(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba564f8149fb98ee50c4012f06708382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10402e4ddd0d323cc1ae83801ae976db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604eac31580789d9f9db63abdcf10232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98211b96f7b32680aaba7ae109fa3f4.png)
您最近一年使用:0次
6 . 脱式计算,能简算的要简算.
50%×2.5×
×64 0.65×101-65% (1-75%)÷(1+
)
50%×2.5×
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4195d5f8f2bc536030045927ee842fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10402e4ddd0d323cc1ae83801ae976db.png)
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7 . 解方程.
x+37.5%x=
x-65%x+15=85 35.5+(x-0.8)÷80%=38
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10402e4ddd0d323cc1ae83801ae976db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84f6fbac102ccf326b2223d69cb7cc.png)
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8 . 计算题
(12345+23451+34512+45123+51234)
6 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cc18c3f61fcc4089f2d628e8c4cb01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdad53fc7b6b53ea01390179348313c6.png)
(12345+23451+34512+45123+51234)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09052719a6d55df23d74d8e3956257ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62cc18c3f61fcc4089f2d628e8c4cb01.png)
![](https://img.xkw.com/dksih/QBM/2019/1/1/2109469790756864/2110194350972928/STEM/cfaccc03671b43ea9944f93f0bf4e660.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdad53fc7b6b53ea01390179348313c6.png)
![](https://img.xkw.com/dksih/QBM/2019/1/1/2109469790756864/2110194350972928/STEM/610b065dd3b643b09a6396a8b2997c51.png?resizew=371)
您最近一年使用:0次
9 . 0.25×[5
-(3-2.5×
)]
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103689424887808/2103979216248832/STEM/825ea99cbe02482daa81e64224bda85b.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2018/12/24/2103689424887808/2103979216248832/STEM/027a1fe4dd0d4723b93efd33f6cfdcb6.png?resizew=13)
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10 . 能简算的要简算.
15×43%+85×0.43
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf519620764fd7f24a40a8f6b41f0265.png)
÷25%
15×43%+85×0.43
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf519620764fd7f24a40a8f6b41f0265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e8b420a8ad61b75fc2d2fdc00fc560.png)
您最近一年使用:0次