diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/2.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/2.js"
new file mode 100644
index 0000000000000000000000000000000000000000..c731c738976016cfefc50ce691e6bb625d87be62
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/2.js"
@@ -0,0 +1,20 @@
+let jia = require('./jia')
+let jian = require('./jian')
+let cheng = require('./cheng')
+let chu = require('./chu')
+
+//加
+let add = (4.3 + 5)
+console.log(add);
+
+//减
+let lower = (10.6 - 6)
+console.log(lower);
+
+//乘
+let multiply = (10 * 5)
+console.log(multiply);
+
+//除
+let divide = (50 / 2)
+console.log(divide);
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/cheng.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/cheng.js"
new file mode 100644
index 0000000000000000000000000000000000000000..13e1e13050e7e1f570748b6165a40a5fdc46088b
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/cheng.js"
@@ -0,0 +1,4 @@
+function multiply(x, y) {
+    return parseInt(x) * parseInt(y)
+}
+exports.multiply = multiply
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/chu.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/chu.js"
new file mode 100644
index 0000000000000000000000000000000000000000..70552c0dc03a696c4719cc5d707ed1636e2bae22
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/chu.js"
@@ -0,0 +1,4 @@
+function divide(x, y) {
+    return parseInt(x) / parseInt(y)
+}
+exports.divide = divide;
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jia.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jia.js"
new file mode 100644
index 0000000000000000000000000000000000000000..aef06e8b7aaf9d713d659560f0e5c1ee5d28e435
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jia.js"
@@ -0,0 +1,6 @@
+function add(x, y) {
+    return parseInt(x) + parseInt(y);
+    console.log(x + y);
+}
+
+exports.add = add
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jian.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jian.js"
new file mode 100644
index 0000000000000000000000000000000000000000..41da38eb5539ae1a452c2b6428270885baf32b15
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/2/jian.js"
@@ -0,0 +1,4 @@
+function lower(x, y) {
+    return parseInt(x) - parseInt(y)
+}
+exports.lower = lower
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/3.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/3.js"
new file mode 100644
index 0000000000000000000000000000000000000000..27daf353789b719fa5a1b143ca4e9d08a9e09574
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/3.js"
@@ -0,0 +1,21 @@
+function add(x, y) {
+    return parseInt(x) + parseInt(y);
+
+}
+
+exports.add = add
+
+function divide(x, y) {
+    return parseInt(x) / parseInt(y)
+}
+exports.divide = divide;
+
+function multiply(x, y) {
+    return parseInt(x) * parseInt(y)
+}
+exports.multiply = multiply
+
+function divide(x, y) {
+    return parseInt(x) / parseInt(y)
+}
+exports.divide = divide;
\ No newline at end of file
diff --git "a/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/4.js" "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/4.js"
new file mode 100644
index 0000000000000000000000000000000000000000..a8dffb59fd412014bb229a42478c6addbd539799
--- /dev/null
+++ "b/nodejs\344\275\234\344\270\232/2022-02-22\345\212\240\345\207\217\344\271\230\351\231\244/4.js"
@@ -0,0 +1,18 @@
+let jjcc = require('./3')
+
+
+//加
+let add = (4.3 + 5)
+console.log(add);
+
+//减
+let lower = (10.6 - 6)
+console.log(lower);
+
+//乘
+let multiply = (10 * 5)
+console.log(multiply);
+
+//除
+let divide = (50 / 2)
+console.log(divide);
\ No newline at end of file