Subtract from Whole 100 Game
Whole hundreds are multiples of 100 up to 900, such as 100, 200, 300, 400, 500, 600, 700, 800, and 900.
The “Subtract from Whole 100 Game” is a step up in difficulty from the Subtract from 100 Game
 
The “Subtract from Whole 100 Game” is an interactive and engaging web-based application designed to help you practice how to subtract from Whole 100. You can use the traditional regrouping method, or the more efficient “Box Method “or “Subtract One” Method. Scroll down the page to learn the different methods.
 
The Game has an option for a 60-second timer, encouraging players to solve subtraction problems quickly and efficiently.
 

Subtract from Whole 100

Practice subtract from Whole 100.

Enable 60-Second Timer

Start Game

Practice subtract from 100

Time: 60

Score: 0 / 0

9 - 3

Check Next

Back to Menu

 

How to Play the Subtract from Whole 100 Game
The game is designed to help you practice your subtract from 100 skills in a fun environment.
Here’s how to play:

1. Timed Option: Check the timer if you want to enable the 60 second timer. Click “Start Game”.
   
2. Look at the Problem: You’ll see two numbers at the top of the red box. Your goal is to subtract them.
   
3. Enter Your Answer: Type your answer into the box with the question mark ?.
   
4. Check Your Work: Click the yellow 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.
   
5. Get a New Problem: Click the blue Next button (or press Enter again) for a new subtraction problem.
   Your score is tracked at the top, showing how many you’ve gotten right out of the total you’ve tried.
6. Back to Menu Click “Back to Menu” to restart the game.

 

Strategies for Subtract from Whole 100
When you encounter a zero in the minuend (the top number) and need to borrow, you can’t borrow from a zero. This necessitates moving to the next non-zero digit to the left. The most common strategies are the standard regrouping method, the box method, and the “subtract one” method.
 
A. The Standard Regrouping Method
This is the traditional, step-by-step process of borrowing. It is a fundamental skill for understanding place value.

1. Start with the ones column. For example, you’re solving 200 − 56. The top ones digit is zero and you need to borrow/regroup from the tens.
2. Move to the tens column to borrow. Since there is a zero in the tens place, you can’t borrow from it.
3. Move to the left to the hundreds columns. Borrow from the hundreds place. Reduce the digit by 1. The 1 you borrowed from the hundreds place makes the adjacent zero (the tens place) a 10.
4. Now that the tens place is a 10, you can borrow from it to help the ones place. The 10 becomes a 9, and the ones place becomes a 10.
5. Subtract. Now you can subtract each column from right to left.
    
   This video gives a clear, step-by-step approach to walk through the “Regrouping Method” for subtraction.
   
   • Show Video
   
    
   

B. The Box Method

1. Identify the zeros: Find the place values where you need to borrow (the zeros). Borrowing:
   
2. If you have multiple zeros in a row, treat them as a single unit. Change the rightmost zero to a 10. Then, change each preceding zero to a 9, effectively “passing” the borrow.
3. Borrow from the next non-zero digit to the left. Reduce that digit by 1.
4. Subtract: Now that you have borrowed and adjusted the numbers, perform the subtraction as usual.
    
   This video gives a clear, step-by-step approach to walk through the “Box Method” for subtraction.
   
   • Show Video
   
    
   C. The “Subtract One Method”
   This is a clever shortcut that can make subtracting across multiple zeros much faster and less prone to error.
   This method is most useful when the minuend is a digit followed by zeros.
   For example, to solve 100 - 56:
   Subtract 1 from both numbers. This changes the problem to 99−55.
   Subtract the new numbers. Because there are no zeros, you can subtract straight down each column without regrouping. The answer is 99−55=44.
   This method works because the difference between two numbers remains the same when you subtract the same amount from both numbers.
    
   This video gives a clear, step-by-step approach to walk through the “Subtract One” Method for subtraction.
   
   • Show Video
   
    
   

Free Subtraction Games
One More, One Less	1-Digit Subtraction	Subtract from 10
Subtract from Whole 10	2-Digit - 1-Digit (No regrouping)	2-Digit - 1-Digit (With regrouping)
Subtract from 100	Subtract from Whole 100	2-Digit - 2-Digit (No regrouping)
2-Digit - 2-Digit (With regrouping)	Subtract across Zeros	3-Digit - 2-Digit

 

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