What is a Number Fact for 5?

S0-SA1-1402

Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

A 'Number Fact for 5' refers to all the different ways you can combine two whole numbers (including zero) through addition to get the answer 5. It shows the pairs of numbers that add up to 5. These facts help you understand how numbers relate to each other.

Simple Example

Quick Example

Imagine you have 5 delicious ladoos. You want to share them with a friend. How many ladoos can you give your friend, and how many do you keep? You could keep 3 ladoos and give 2 to your friend (3 + 2 = 5). This '3 and 2' is a number fact for 5.

Worked Example

Step-by-Step

Let's find all the number facts for 5 using addition.

Step 1: Start with 0. What number do you add to 0 to get 5? 0 + 5 = 5.
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Step 2: Move to 1. What number do you add to 1 to get 5? 1 + 4 = 5.
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Step 3: Move to 2. What number do you add to 2 to get 5? 2 + 3 = 5.
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Step 4: Move to 3. What number do you add to 3 to get 5? 3 + 2 = 5.
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Step 5: Move to 4. What number do you add to 4 to get 5? 4 + 1 = 5.
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Step 6: Move to 5. What number do you add to 5 to get 5? 5 + 0 = 5.

Answer: The number facts for 5 are (0, 5), (1, 4), (2, 3), (3, 2), (4, 1), and (5, 0).

Why It Matters

Understanding number facts builds a strong foundation for all math. It helps you do calculations faster in your head and makes solving bigger problems easier. This skill is useful for careers like shopkeeping, accounting, and even game development where quick calculations are needed.

Common Mistakes

MISTAKE: Forgetting to include 0 in the pairs (e.g., only listing 1+4, 2+3). | CORRECTION: Always start with 0 and work your way up to find all possible pairs.

MISTAKE: Listing only one order, like 1+4=5, but not 4+1=5. | CORRECTION: Remember that the order of numbers in addition can be swapped (like 1+4 and 4+1) and they are usually considered distinct number facts.

MISTAKE: Including pairs that add up to a different number, like 2+4=6. | CORRECTION: Double-check each pair to make sure their sum is exactly 5.

Practice Questions

Try It Yourself

QUESTION: Which pair of numbers adds up to 5? (a) 2 and 4 (b) 1 and 3 (c) 3 and 2 | ANSWER: (c) 3 and 2

QUESTION: If you have 5 rupees and spend 0 rupees, how much do you have left? What number fact for 5 does this show? | ANSWER: You have 5 rupees left. This shows the number fact 0 + 5 = 5.

QUESTION: Your mom gave you 5 chocolates. You ate some and gave 2 to your sibling. How many did you eat? Write this as a number fact for 5. | ANSWER: You ate 3 chocolates. The number fact is 3 + 2 = 5.

MCQ

Quick Quiz

Which of these is NOT a number fact for 5?

0 + 5

1 + 4

2 + 3

3 + 3

The Correct Answer Is:

Options A, B, and C all add up to 5. Option D (3 + 3) adds up to 6, so it is not a number fact for 5.

Real World Connection

In the Real World

When you pay for something at a local kirana store and the total bill is 5 rupees, the shopkeeper quickly calculates how much change to give you if you pay with a 10-rupee note. They use number facts like 5 + 5 = 10 without even thinking about it. Similarly, when you count players in a small gully cricket team, you use number facts to quickly see if you have enough players.

Key Vocabulary

Key Terms

ADDITION: The process of combining two or more numbers to find their total sum | SUM: The result of adding two or more numbers together | WHOLE NUMBERS: Numbers without fractions or decimals (0, 1, 2, 3, etc.) | PAIR: Two things that are alike and used together

What's Next

What to Learn Next

Great job learning number facts for 5! Next, you can explore 'Number Facts for 10'. This will build on what you've learned and further strengthen your mental math skills, which are super important for higher classes.