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lmj01 · May 15, 2024 · e50c0c1 · e50c0c1
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diff --git a/articles/notes/excel.md b/articles/notes/excel.md
@@ -13,6 +13,8 @@
 It provides data binding, data validation, filtering, sorting, and CRUD operations.
 >> 展示excel
 
+- [api doc](https://handsontable.com/docs/javascript-data-grid/api/)
+
 样式需要在这里指定
 
 ## [前端 Excel Workbook Manager ](https://github.com/exceljs/exceljs)

diff --git a/exercises/index.md b/exercises/index.md
@@ -1,5 +1,7 @@
 # 习题
 > 典型和分类学习
 
+
+- [数论](/exercises/number.theory.md)
 - [夹逼法](/exercises/sequeezing.md)
 - [二次方程](/exercises/quadratic.equation.md)
diff --git a/exercises/number.theory.md b/exercises/number.theory.md
@@ -0,0 +1,10 @@
+# 数论
+
+- 加法与减法
+    1. 进位加法
+- 乘法
+    1. 乘法交换律
+- 除法
+- 模运算
+- 等差数列求和运算
+- 排列组合