Adding and Subtracting
Do simple math with plus and minus.
Adding and Subtracting is a free Coding for Kids lesson on CoddyKit — lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Coding for Kids learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Math Magic! 🧮
Did you know the computer is a math wizard? 🧙
It can add and subtract super fast! Let us learn the magic signs! ✨
print(2 + 3)The Plus Sign + ➕
The + sign means add! It puts numbers together.
2 + 3 means 2 and 3 together. The computer counts them up! 🎉
print(4 + 5)Adding Candies 🍬
If you have 3 candies and get 4 more, how many do you have?
Let the computer add them! 3 + 4. Yummy math! 🍭
print(3 + 4)The Minus Sign - ➖
The - sign means subtract, which is take away!
5 - 2 means start with 5, take away 2. What is left? 🤔
print(5 - 2)Eating Cookies 🍪
You have 10 cookies and eat 3. How many are left?
The computer subtracts! 10 - 3. Crunch crunch! 😋
print(10 - 3)Bigger Adds 🦣
The computer can add big numbers too, no problem!
Try adding two big numbers. It is lightning fast! ⚡
print(100 + 250)Add Three Numbers 3️⃣
You can add more than two numbers at once!
Just keep using the + sign. 1 + 2 + 3! 🎈
print(1 + 2 + 3)Mix Add and Subtract 🔀
You can add AND subtract in the same line!
Like 10 + 5 - 3. The computer does it in order! 🧠
print(10 + 5 - 3)Counting Pets 🐶🐱
You have 2 dogs and 3 cats. How many pets total?
Add them up! 2 + 3. So many furry friends! 🥰
print(2 + 3)Try Your Own Math 🎲
Pick your own numbers to add or subtract!
Change the numbers and run it. Have fun experimenting! 🔬
print(7 + 8 - 5)Math Wizard! 🧙
You can now add and subtract like a true math wizard!
Plus and minus are your magic wands! 🪄
print(20 - 4 + 1)Quick Check ✅
Math question! ➕
Super Adder! 🌟
You learned to add with + and subtract with -!
Next, you will learn to multiply and divide! 🔢
Frequently asked questions
Is the “Adding and Subtracting” lesson free?
Yes — the full text of “Adding and Subtracting” is free to read here on the web, and the Coding for Kids course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Coding for Kids course, upgrade to CoddyKit PRO.
What will I learn in “Adding and Subtracting”?
Do simple math with plus and minus. You practise Coding for Kids with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Coding for Kids?
No prior experience is required. Coding for Kids on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Adding and Subtracting” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Coding for Kids lesson?
Yes. Every Coding for Kids lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Adding and Subtracting
- Multiplying and Dividing
- Whole Numbers and Decimals
- Math with Variables