diff --git a/JS_1/index.html b/JS_1/index.html
index 4561108..275a4bf 100644
--- a/JS_1/index.html
+++ b/JS_1/index.html
@@ -3,16 +3,18 @@
 
 <head>
     <meta charset="utf-8" />
+    <base href=".">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>JS</title>
-    <link rel="stylesheet" href="/css/style.css" />
+    <link rel="stylesheet" href="css/style.css" />
 </head>
 
 <body>
+    <base href=".">
     <a href="" name="anchor_nav" class="anchor-top"></a>
     <nav>
         <div class="dropdown">
-            <img src="/html.png" alt="" class="logo">
+            <img src="html.png" alt="" class="logo">
             <div class="dropdown-content">
                 <img src="/IMG_20210705_171251_375.jpg" alt="">
                 Створив та не буде підтримувати сайт студент ЧНУ ФМІ Кіящено Михайло, 207 група
@@ -40,7 +42,11 @@
                 </div>
 
                 <div class="btn-lab">
-                    <button id="button_school">Start</button>
+                    <button id="button_school" onclick="add()">+</button>
+                    <button id="button_school" onclick="substract()">-</button>
+                    <button id="button_school" onclick="multiply()">*</button>
+                    <button id="button_school" onclick="divide()">:</button>
+
                     <label id="label_school_output">Result</label>
                 </div>
             </div>
@@ -82,7 +88,7 @@
             </div>
         </section>
     </div>
-    <script src="/script.js"></script>
+    <script src="script.js"></script>
 
 </body>
 
diff --git a/JS_1/script.js b/JS_1/script.js
index daf38f6..229be89 100644
--- a/JS_1/script.js
+++ b/JS_1/script.js
@@ -66,7 +66,7 @@ function spellingHryvnia()
     out.innerHTML = result;
 }
 
-btnSchool.addEventListener("click", commonDenominator);
+// btnSchool.addEventListener("click", commonDenominator);
 
 
 function firstLetterToCapital ()
@@ -88,4 +88,57 @@ function firstLetterToCapital ()
     out.innerHTML = result;
 }
 
+function add(){
+    let a = document.querySelector("#input_school_a");
+    let b = document.querySelector("#input_school_b");
+
+    let result;
+    let aNum = Number(a.value);
+    let bNum = Number(b.value);
+
+    result = aNum + bNum;
+    let out = document.querySelector("#label_school_output");
+    out.innerHTML = result;
+}
+
+function substract(){
+    let a = document.querySelector("#input_school_a");
+    let b = document.querySelector("#input_school_b");
+
+    let result;
+    let aNum = Number(a.value);
+    let bNum = Number(b.value);
+
+    result = aNum - bNum;
+    let out = document.querySelector("#label_school_output");
+    out.innerHTML = result;
+}
+
+function multiply(){
+    let a = document.querySelector("#input_school_a");
+    let b = document.querySelector("#input_school_b");
+
+    let result;
+    let aNum = Number(a.value);
+    let bNum = Number(b.value);
+
+    result = aNum * bNum;
+    let out = document.querySelector("#label_school_output");
+    out.innerHTML = result;
+}
+
+function divide(){
+    let a = document.querySelector("#input_school_a");
+    let b = document.querySelector("#input_school_b");
+
+    let result;
+    let aNum = Number(a.value);
+    let bNum = Number(b.value);
+
+    result = aNum / bNum;
+    let out = document.querySelector("#label_school_output");
+    out.innerHTML = result;
+}
+
+
 btnEditor.addEventListener("click", firstLetterToCapital);
