2-Digit + 1-Digit (No Regrouping) Game
 
The “2-digit + 1-digit with no regrouping” game is designed to help players practice basic addition facts without the added complexity of carrying over a ten. It is suitable for learners who are just starting with two-digit addition.
 

In this game, all the problems are specifically created so that the sum of the ones digits is always 9 or less. This means you can solve the problem by simply adding the ones and then combining that with the tens digit, with no regrouping/carrying needed.
 
When you have learned regrouping, you can try out this other 2-Digit + 1-Digit Game (with regrouping).
 

 

How to Play the 2-Digit + 1-Digit (No Regrouping) Game

1. Look at the Problem: You’ll see two numbers at the top of the purple box. Your goal is to add them together.
   
2. Enter Your Answer: Type your answer into the box with the question mark ?.
   
3. Check Your Work: Click the green Check button (or press the Enter key). The game will tell you if you’re correct. If you are wrong, you will be shown the correct answer.
   
4. Get a New Problem: Click the yellow Next button (or press Enter again) for a new addition problem.
   Your score is tracked at the top, showing how many you’ve gotten right out of the total you’ve tried.
    
   

Strategies for Mental 1-Digit Addition
You will need to use these strategies for 1 digit addition when you add up the ones digits.
 

1. The “Count On” Method
   This is a good first step away from simple counting. To solve a problem like 7 + 2, you start with the bigger number and count on the smaller number.
   Example: 7 + 2
   Start with 7 in your head.
   Count on two more: 8, 9.
   The answer is 9.
   This method is most effective when adding a small number, like 1, 2, or 3.
   
   
2. The “Making 10” Strategy
   This is one of the most important mental math tricks. Our number system is based on 10, so getting to 10 makes problems much easier. To add two numbers that sum to more than 10, you break one of the numbers apart to “make a 10” with the other.
   Example: 8 + 5
   You want to make the 8 a 10. You know you need 2 more (8 + 2 = 10).
   Break the 5 into 2 and 3.
   Now, the problem becomes (8 + 2) + 3.
   Since 8 + 2 is 10, the problem is simply 10 + 3.
   The answer is 13.
   
   
3. Doubles and Near Doubles
   Knowing your “doubles” (like 3 + 3 = 6 and 5 + 5 = 10) can help you quickly solve related problems.
   Example: 4 + 5
   You know that 4 + 4 = 8.
   Since 5 is just one more than 4, the answer to 4 + 5 must be one more than 8.
   The answer is 9.
    
   

By practicing these strategies, you will build the “number sense” that allows you to solve problems quickly in your head. The addition game is a great place to practice these mental tricks until they become second nature.
 

Free Addition Games
One More, One Less	1-Digit Addition	Addition (Maximum Sum)
Add Doubles	Number Bonds (Missing Addend)	Add 3 or more single digits
Fixed Addend	Understand the Equal Sign	Fact Families Game
2-digit + 1-Digit (no regrouping)	2-Digit + 2-Digit (no regrouping)	Add Multiples of 10
2-digit + 1-digit Column Addition	2-digit Column Addition
3-digit + 2-digit Column Addition	3-digit Column Addition
2-digit + 1-digit (with regrouping)	2-Digit + 2-Digit (with regrouping)	3-Digit Addition

 

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