diff --git "a/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo1.js" "b/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo1.js"
new file mode 100644
index 0000000000000000000000000000000000000000..0547d4042947dcb728c870268c2be991708ee299
--- /dev/null
+++ "b/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo1.js"
@@ -0,0 +1,22 @@
+let a = 11;
+let b = 2;
+
+function jia(){
+    console.log(a+b);
+}
+function jian(){
+    console.log(a-b);
+}
+function cheng(){
+    console.log(a*b);
+}
+function chu(){
+    console.log(a/b);
+}
+module.exports = {
+    jia : jia,
+    jian : jian,
+    cheng : cheng,
+    chu : chu
+}
+
diff --git "a/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo2.js" "b/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo2.js"
new file mode 100644
index 0000000000000000000000000000000000000000..2ab23ea4dd212eac45441e2e2f59bed072a6a6a8
--- /dev/null
+++ "b/\345\220\264\351\233\262\346\263\211/22.02.21\345\212\240\345\207\217\344\271\230\351\231\244/demo2.js"
@@ -0,0 +1,6 @@
+let demo1 = require('./demo1');
+
+demo1.jia();
+demo1.jian();
+demo1.cheng();
+demo1.chu();
\ No newline at end of file