What is Adding to Make 10?

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Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

Adding to Make 10 means finding two numbers that, when put together, give you the total of 10. It's a fundamental skill in mathematics that helps you quickly solve problems and understand number relationships.

Simple Example

Quick Example

Imagine you have 7 ladoos. How many more ladoos do you need to have a full box of 10 ladoos? You need 3 more ladoos because 7 + 3 = 10.

Worked Example

Step-by-Step

PROBLEM: Varun has 4 cricket balls. He wants to collect 10 cricket balls in total. How many more balls does he need?
---STEP 1: Understand the goal. Varun wants to reach 10 balls.
---STEP 2: Identify what he already has. He has 4 balls.
---STEP 3: Think: '4 plus what number equals 10?'
---STEP 4: You can count up from 4 (5, 6, 7, 8, 9, 10) and see you counted 6 numbers.
---STEP 5: So, 4 + 6 = 10.
ANSWER: Varun needs 6 more cricket balls.

Why It Matters

Understanding how numbers add up to 10 is super important for quick mental math, which helps you in higher classes. It's a building block for addition, subtraction, and even multiplication, useful for careers like shopkeeping, banking, or even managing your own pocket money.

Common Mistakes

MISTAKE: Counting all numbers from 1 instead of counting up from the given number. For example, for '4 + ? = 10', counting 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and then trying to find the missing part. | CORRECTION: Start counting from the given number and stop at 10, keeping track of how many steps you took. For '4 + ? = 10', start at 4, then count '5 (1), 6 (2), 7 (3), 8 (4), 9 (5), 10 (6)'. The answer is 6.

MISTAKE: Confusing 'adding to make 10' with 'adding 10 to a number'. For example, thinking '4 + ? = 10' is the same as '4 + 10'. | CORRECTION: Remember that 'adding to make 10' means 10 is the *total* you want to reach, not a number you are adding. You are looking for the missing part to complete 10.

MISTAKE: Guessing numbers randomly without a strategy. For example, for '3 + ? = 10', guessing 5, then 6, then 8. | CORRECTION: Use a systematic approach like counting on your fingers, using a number line, or recalling number pairs you've learned (like 1+9, 2+8, 3+7, etc.).

Practice Questions

Try It Yourself

QUESTION: If you have 8 rupees, how many more rupees do you need to buy a 10-rupee candy bar? | ANSWER: 2 rupees (8 + 2 = 10)

QUESTION: A class has 10 students. If 5 students are boys, how many girls are there? | ANSWER: 5 girls (5 + 5 = 10)

QUESTION: Reema collected some flowers. Her friend gave her 7 more, and now Reema has 10 flowers. How many flowers did Reema have to begin with? | ANSWER: 3 flowers (3 + 7 = 10)

MCQ

Quick Quiz

Which pair of numbers adds up to 10?

5 and 4

6 and 3

7 and 3

8 and 1

The Correct Answer Is:

The correct option is C because 7 + 3 = 10. Options A, B, and D do not sum up to 10 (5+4=9, 6+3=9, 8+1=9).

Real World Connection

In the Real World

Knowing how to make 10 quickly helps you with daily tasks like calculating change at a shop. If you buy something for ₹7 and pay with a ₹10 note, you instantly know you should get ₹3 back (7 + 3 = 10). This skill is also used by delivery riders to quickly calculate total items or distances.

Key Vocabulary

Key Terms

ADDITION: The process of combining two or more numbers to find their total | SUM: The result of adding two or more numbers together | NUMBER PAIRS: Two numbers that add up to a specific total, like 3 and 7 are a number pair for 10 | TOTAL: The whole amount or quantity

What's Next

What to Learn Next

Once you're good at making 10, you can move on to 'Adding to Make 20' and 'Number Bonds to 100'. These concepts build on your understanding of number relationships and will make even bigger calculations seem easy!