101 LearnersLast updated on August 5th, 2025
Subtraction of One Digit
The mathematical operation of finding the difference between two numbers is known as subtraction. In the context of one-digit subtraction, it involves subtracting one single-digit number from another. This fundamental arithmetic operation helps build the foundation for more complex mathematical concepts.
What is Subtraction of One Digit?
Subtracting one-digit numbers involves taking one single-digit number away from another. The minuend is the number from which we subtract, and the subtrahend is the number that is subtracted. The result is known as the difference. Subtraction is a basic operation in arithmetic, essential for solving problems involving numbers.
How to do Subtraction of One Digit?
When subtracting one-digit numbers, students should follow these simple steps:
Start with the larger number: Place the larger number first to avoid negative results.
Count down: Use fingers or visual aids to count down from the larger number by the amount of the smaller number.
Write the result: The number you land on after counting down is the difference.
Methods to do Subtraction of One Digit
There are a few simple methods to perform one-digit subtraction:
Method 1: Counting Backwards
To subtract by counting backwards, start from the minuend and count backwards by the number of the subtrahend.
For example, to calculate 8 - 3, count back from 8: 7, 6, 5. The result is 5.
Method 2: Using a Number Line
Draw a number line and mark the minuend. Move left on the number line by the value of the subtrahend.
For example, for 6 - 2, start at 6 and move two steps left to land on 4.
Properties of Subtraction of One Digit
Subtraction has several key properties:
- Subtraction is not commutative Changing the order of the numbers changes the result, i.e., A - B ≠ B - A.
- Subtraction is not associative When subtracting, changing the grouping of numbers changes the result. (A - B) - C ≠ A - (B - C).
- Subtraction is the addition of the opposite Subtracting is the same as adding the negative of the number: A - B = A + (-B).
- Subtracting zero leaves the number unchanged Subtracting zero from a number does not change it: A - 0 = A.
Tips and Tricks for Subtraction of One Digit
Here are some tips to efficiently perform one-digit subtraction:
Tip 1: Always start with the larger number to make it easier to calculate the difference.
Tip 2: Use visual aids like fingers or counting beads for a clearer understanding.
Tip 3: Practice using number lines, as they provide a visual representation of subtraction.
Forgetting to start with the larger number
When subtracting, always begin with the larger number to avoid confusion and negative results.
Mistake 1
Miscounting
Double-check the counting process to ensure accuracy when counting down or using number lines.
Mistake 2
Ignoring zero
Remember that subtracting zero does not change the number, so don’t alter the minuend when the subtrahend is zero.
Mistake 3
Overlapping fingers or markers
When using fingers or markers, be careful not to overlap or skip any, as this can lead to incorrect results.
Mistake 4
Misaligning on the number line
Ensure correct placement on the number line to avoid jumping to the wrong number.
Mistake 5
Examples of Subtraction of One Digit
What is 9 minus 4?
5
Problem 1
Use the counting backwards method: Start from 9 and count back four steps: 8, 7, 6, 5. The result is 5.
Subtract 2 from 7
Explanation
5
Problem 2
Use a number line: Start at 7 and move two steps left to land on 5.
Calculate 8 - 3
Explanation
5
Problem 3
Count backwards: From 8, count back three steps: 7, 6, 5. The result is 5.
What is 6 - 2?
Explanation
4
Problem 4
Using the number line method: Start at 6 and move two steps left to reach 4.
Find the result of 5 - 1
Explanation
4
No, in basic one-digit subtraction, you should always start with the larger number to avoid negative results.
1.Is subtraction commutative in one-digit numbers?
2.What is the first step of one-digit subtraction?
3.How can using a number line help with subtraction?
4.What tools can aid in learning one-digit subtraction?
5.How can children in United States use numbers in everyday life to understand Subtraction of One Digit?
6.What are some fun ways kids in United States can practice Subtraction of One Digit with numbers?
7.What role do numbers and Subtraction of One Digit play in helping children in United States develop problem-solving skills?
8.How can families in United States create number-rich environments to improve Subtraction of One Digit skills?
Common Mistakes and How to Avoid Them in Subtraction of One Digit
Subtraction can be tricky for beginners, leading to common mistakes. Knowing these errors can help students avoid them.
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Hiralee Lalitkumar Makwana
About the Author
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
Fun Fact
: She loves to read number jokes and games.
