名校
1 . 若一个四位自然数
,满足个位数字与十位数字之和的平方正好等于
的千位数字与百位数字组成的两位数,则这个四位数称为“和数”,比如:
,满足
;若一个四位自然数
,满足个位数字与十位数字的平方差正好等于
的千位数字与百位数字组成的两位数,则这个四位数称为“差数”,比如:
,满足
;那么最大的“和数”与最小的“差数”之和是___________ .如果一个“和数”
与一个“差数”
的个位数字均为
、十位数字均为
,且
,若
为整数时,记
,则
的最大值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdaeb02061832bf85a17b6083ede810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb8e886d9bcc8d431e624352934bf99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509ae5bfaf32c11bac2c4ad7dd5613e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ff5be784f13ac3c115d09a020be355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ae24b100af78eebfe33e5419b71f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbaa672844e7fb5b2982935c8e247bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095e4864fedfd5ad5e47b07635bc6b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f1a76680fc615ba35d939b1785a56e.png)
您最近一年使用:0次
2024-04-08更新
|
929次组卷
|
3卷引用:海南省琼海市嘉积中学2023-2024学年八年级下学期期中考试数学试题B卷
名校
2 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867337b439be79f6e42e0055c15de03a.png)
(2)化简求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867337b439be79f6e42e0055c15de03a.png)
(2)化简求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d65ab923088bc9adc786708f0a363e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1c84057882768f20a01365c81b6760.png)
您最近一年使用:0次
3 . 计算下列各题:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b2607e73b1316d2ea380adb3086fe9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43ff215f875bc0e6c6c2f869b345696.png)
您最近一年使用:0次
4 . 利用乘法公式进行简便计算:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a150d26d693c91655d8ec0c74d3cf55.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcd3922e9637e2cd9ae44e6cfee7b82.png)
您最近一年使用:0次
名校
5 . 化简求值:
(1)已知
,求代数式
的值.
(2)已知
,求
.
(3)计算:
.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e709ffaff8e97de2a9266989e4aec7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959d0d4985ca7617f813939e301ab731.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fe69b28eb499102d734ce98f563b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61eefec5d5b4a30247e5f6dc96c9db89.png)
(3)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ceb823459dbcda0fe4f2a315c64681.png)
您最近一年使用:0次
6 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f98b1d1b0fa565cf3567c9c4b369b9.png)
(2)
.
(3)解方程
;
(4)解方程
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f98b1d1b0fa565cf3567c9c4b369b9.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1524262d8d32da61e202d4f388ed08c6.png)
(3)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bad6bc1157a7aaf25dd5b391999858.png)
(4)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8f7fdfb2dc6fc16e1157584f249009.png)
您最近一年使用:0次
7 . 如图,从边长为
的正方形纸片中剪去一个边长为3cm的小正方形,剩余部分沿虚线又剪拼成一个矩形(不重叠无缝隙),则矩形的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/95840606-8e36-43c0-8963-fc1fb2f21f3e.png?resizew=464)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4da8cfb7b2b79a975e1278230b3356.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/95840606-8e36-43c0-8963-fc1fb2f21f3e.png?resizew=464)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
8 . 若
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8792eaab0b6464e5d07436c64aa751a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a655d6935ae3f646e17ff72bc213e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
A.1 | B.2 | C.![]() | D.5 |
您最近一年使用:0次
9 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9738a8bcc354b5704c08b57854041b5.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9738a8bcc354b5704c08b57854041b5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdaf883166f07bc753def1f0183da482.png)
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10 . 下列计算中,正确的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次