diff --git "a/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/homework.js" "b/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/homework.js"
new file mode 100644
index 0000000000000000000000000000000000000000..c44a174e8ad50db9eb1350dd9925720565c7b9d1
--- /dev/null
+++ "b/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/homework.js"
@@ -0,0 +1,32 @@
+let math=require("./moduleCount")
+//加
+try{
+    let result=math.handle(1,3,"add");
+    console.log(result);
+}catch( error){
+    console.log(error.message);
+};
+
+//减
+try{
+    let result=math.handle(1,3,"subtract");
+    console.log(result);
+}catch( error){
+    console.log(error.message);
+};
+
+//乘
+try{
+   let result=math.handle(1,3,"multiply");
+    console.log(result);
+}catch( error){
+    console.log(error.message);
+};
+
+//除
+try{
+    let result=math.handle(1,3,"divide");
+    console.log(result);
+}catch( error){
+    console.log(error.message);
+};
diff --git "a/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/moduleCount.js" "b/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/moduleCount.js"
new file mode 100644
index 0000000000000000000000000000000000000000..784aed30f787844a1a503976ea7d45bb4dbe213e
--- /dev/null
+++ "b/\346\230\223\346\226\207\350\220\215\347\232\204\344\275\234\344\270\232/2022-02-23-\344\275\234\344\270\232/moduleCount.js"
@@ -0,0 +1,66 @@
+
+// add (加), subtract(减) , multiply(乘) and divide(除)
+
+//加
+function add( a, b){
+    if(isNaN(a)||isNaN(b)){
+        console.log(a);
+        throw new Error("请输入数字");
+    }
+    return a+b;
+};
+//减
+function subtract( a, b){
+    if(isNaN(a)||isNaN(b)){
+        console.log(a);
+        throw new Error("请输入数字");
+    };
+    return a-b;
+};
+//乘
+function multiply( a, b){
+    if(isNaN(a)||isNaN(b)){
+        console.log(a);
+        throw new Error("请输入数字");
+    };
+    return a*b;
+};
+function divide( a, b){
+    if(isNaN(a)||isNaN(b)){
+        console.log(a);
+        throw new Error("请输入数字");
+    };
+    return a/b;
+};
+var count = { 
+    //加
+	add: function (a,b) { 
+		return a+b;
+    },
+    //减
+    subtract:function (a,b) {
+        return a-b;
+    },
+    //乘
+    multiply:function(a,b){
+        return a*b;
+    },
+    //除
+    divide:function (a,b) {
+        return a/b;
+    }
+};
+function handle(a,b,funcname){
+    if(isNaN(a)||isNaN(b)){
+        throw new Error("请输入数字");
+    }
+    return count[funcname](a,b);
+};
+
+module.exports={
+    add:add,
+    subtract:subtract,
+    multiply,
+    divide,
+    handle:handle
+};
\ No newline at end of file