What is a Number Bond to 10?

S0-SA1-0032

Grade Level:

Class 1

Maths

Definition

What is it?

A Number Bond to 10 shows different pairs of numbers that add up to exactly 10. It helps us understand how numbers combine to make 10. Think of it as finding two friends whose ages total 10.

Simple Example

Quick Example

Imagine you have 10 laddoos for a party. If you give 3 laddoos to one friend, how many laddoos are left for another friend so that the total is still 10? The answer is 7. So, 3 and 7 form a number bond to 10.

Worked Example

Step-by-Step

Let's find the missing number in the bond to 10: 4 + ? = 10
---Step 1: Start with the total we want, which is 10.
---Step 2: We already have one part of the bond, which is 4.
---Step 3: To find the missing part, we subtract the known part from the total: 10 - 4.
---Step 4: Counting back from 10, or using your fingers, 10 - 4 equals 6.
---Step 5: So, the missing number is 6.
---Answer: 4 + 6 = 10

Why It Matters

Understanding number bonds to 10 is crucial for quick mental math and building a strong foundation in arithmetic. It helps in careers like becoming a cashier at a grocery store, managing inventory, or even in advanced fields like data analysis where quick calculations are essential.

Common Mistakes

MISTAKE: Students often add the two numbers to get a number greater than 10, instead of finding the missing part. For example, for '7 and ? make 10', they might say 7+10=17. | CORRECTION: Remember that the two numbers must ADD UP to 10. If you have 7, think 'how much more do I need to reach 10?'

MISTAKE: Confusing number bonds to 10 with number bonds to other totals, like 5 or 20. | CORRECTION: Always check the target total. For 'number bond to 10', the sum must always be 10.

MISTAKE: Forgetting that zero is also a number. For example, for '10 and ? make 10', students might think there's no answer. | CORRECTION: 10 + 0 = 10 is a valid number bond. Zero is a very important number!

Practice Questions

Try It Yourself

QUESTION: What number goes with 8 to make 10? | ANSWER: 2

QUESTION: If you have 6 colourful kites, how many more do you need to have a total of 10 kites? | ANSWER: 4

QUESTION: Find the missing number: ? + 5 = 10. Then, write another pair of numbers that also make 10. | ANSWER: Missing number is 5. Another pair could be 1 + 9 = 10 (or 2+8, 3+7, 4+6, 0+10, 10+0).

MCQ

Quick Quiz

Which pair of numbers does NOT make a number bond to 10?

5 and 5

7 and 3

6 and 4

8 and 3

The Correct Answer Is:

Options A, B, and C all add up to 10 (5+5=10, 7+3=10, 6+4=10). Option D (8+3) adds up to 11, not 10, so it is not a number bond to 10.

Real World Connection

In the Real World

When a shopkeeper gives you change for a ₹10 note, they are using number bonds to 10. For example, if your item costs ₹7, the shopkeeper quickly calculates that they need to give you ₹3 back to make ₹10 (7+3=10). This quick calculation is a number bond to 10 in action.

Key Vocabulary

Key Terms

NUMBER BOND: A pair of numbers that combine to make a specific total | SUM: The result of adding two or more numbers together | PART-PART-WHOLE: A way to think about numbers where two 'parts' combine to make a 'whole' (e.g., 3 and 7 are parts, 10 is the whole) | ADDITION: The process of combining numbers

What's Next

What to Learn Next

Great job learning number bonds to 10! Next, you can explore 'Number Bonds to 20'. The idea is the same, but you'll be working with larger numbers, which will further improve your mental math skills and prepare you for more complex addition and subtraction.