Addition Within 10
Addition within 10 means adding two numbers whose sum does not go past 10. These are the first addition facts a child learns.
We can use fingers, counting on, or a number line to find the answer.
What is Addition Within 10 - Class 1 Maths (Addition (Grade 1))?
Addition within 10 includes all sums where the answer is 10 or less. Examples: 3 + 2 = 5, 4 + 6 = 10, 1 + 1 = 2.
| + | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| 0 | 0 | 1 | 2 | 3 | 4 | 5 |
| 1 | 1 | 2 | 3 | 4 | 5 | 6 |
| 2 | 2 | 3 | 4 | 5 | 6 | 7 |
| 3 | 3 | 4 | 5 | 6 | 7 | 8 |
| 4 | 4 | 5 | 6 | 7 | 8 | 9 |
| 5 | 5 | 6 | 7 | 8 | 9 | 10 |
Solved Examples
Example 1: 2 + 3
Question: What is 2 + 3?
Think:
- Start at 2 on the number line
- Jump forward 3 times: 3, 4, 5
0 — 1 — 2 — 3 — 4 — 5
Answer: 2 + 3 = 5.
Example 2: 6 + 4
Question: What is 6 + 4?
Think:
- Start at 6, count on 4: 7, 8, 9, 10
Answer: 6 + 4 = 10.
Example 3: Ria's Toffees
Question: Ria has 5 toffees. Priya gives her 3 more. How many toffees in all?
Think:
- Start with 5
- Add 3 more: 6, 7, 8
Answer: 5 + 3 = 8 toffees.
Example 4: 1 + 7
Question: What is 1 + 7?
Think:
- Start at 7 (the bigger number)
- Count on 1: 8
Answer: 1 + 7 = 8.
Example 5: 0 + 9
Question: What is 0 + 9?
Think:
- Adding 0 means nothing is added
- The number stays the same
Answer: 0 + 9 = 9.
Example 6: Aman's Pencils
Question: Aman has 4 pencils in his box and 4 on the table. How many pencils in total?
Think:
- 4 + 4 = 8
Answer: Aman has 8 pencils.
Example 7: 3 + 7
Question: Find the sum of 3 and 7.
Think:
- Start at 7, count on 3: 8, 9, 10
Answer: 3 + 7 = 10.
Key Points to Remember
- In addition within 10, the sum is always 10 or less.
- Use counting on: start from the bigger number and count forward.
- Adding 0 to any number gives the same number.
- Adding 1 gives the next number.
- Pairs that make 10: 1+9, 2+8, 3+7, 4+6, 5+5.
- You can add in any order: 3 + 4 = 4 + 3.
Practice Problems
- What is 5 + 4?
- What is 2 + 8?
- Aditi has 3 chapatis. She eats 0. Then she gets 6 more. How many now?
- Find the sum: 7 + 2.
- Fill in: 4 + ___ = 10.
- Use the number line to find 1 + 9.
Frequently Asked Questions
Q1. What is addition within 10?
It is adding two numbers so that the sum is 10 or less. Examples: 2+3=5, 4+6=10.
Q2. What is counting on?
Counting on means starting from a number and counting forward. To add 3+4, start at 4 and count: 5, 6, 7.
Q3. Which number pairs make 10?
1+9, 2+8, 3+7, 4+6, and 5+5. These are called number bonds to 10.
Q4. Can I add in any order?
Yes. 3+5 and 5+3 both give 8. The order does not change the sum.
Q5. What happens when I add 0?
Adding 0 changes nothing. The number stays the same. 7+0=7.
Q6. How do I add faster?
Start from the bigger number and count on the smaller number. This means fewer counting steps.
