Number Bonds to 5: Part-Whole Relationships

Free sample questions, a clear explanation, and 5 practice skills with an AI tutor that guides without giving the answer away.

Super Number Bond Friends!

Hello, Math Explorer! Have you ever shared a snack with a friend? Imagine you have a big bunch of grapes. That's your whole bunch. When you give some to your friend and keep some for yourself, you've made two smaller groups. Those are the parts!

Number bonds are just like that! They show us how a "whole" number is made up of smaller "parts." It's like a number family!

Let's Build with Numbers!

Let's try it! Grab 3 small toys, like blocks or crayons. You have a whole group of 3. Can you split them into two parts? You could make a pile of 1 and a pile of 2. See? 1 and 2 are parts that make the whole number 3!

Now, let's put numbers together! Find 2 red blocks and 2 blue blocks. Push them all together. How many do you have now? Four! You just composed, or built, the number 4 from two parts: 2 and 2.

Key Takeaway!

A whole number can be broken into two smaller parts. When you put the parts back together, you get the whole again! That's a number bond.

Sharing Five Sparkly Stickers!

Wow! You have 5 sparkly stickers to share with your best friend. The whole number is 5. Let's find all the ways you can share them. These are the number bonds for 5!

You could keep 1 sticker and give your friend 4. (1 and 4 make 5)
You could keep 2 stickers and give your friend 3. (2 and 3 make 5)
You could keep 3 stickers and give your friend 2. (3 and 2 make 5)
You could keep 4 stickers and give your friend 1. (4 and 1 make 5)
You could even keep all 5 and give your friend 0! (5 and 0 make 5)

Great job making number families! You are a number bond superstar. Keep looking for parts and wholes all around you!

Sample questions

1. You have 3 yummy apples. If 1 apple is red, how many apples are green?

○ 1

✓ 2

○ 3

○ 4

Answer: 2 — Get 3 small toys. Put 1 toy on one side. Count how many toys are left on the other side.

2. There are 3 bouncy balls. If 2 balls are big, how many balls are small?

○ 0

○ 2

✓ 1

○ 3

Answer: 1 — Imagine 3 circles. Color 2 circles. How many circles are not colored?

3. You see 3 pretty flowers. If 0 flowers are yellow, how many flowers are red?

○ 0

○ 1

○ 2

✓ 3

Answer: 3 — Hold up 3 fingers. If zero fingers are tucked down, how many fingers are up?

Skills in this topic

Decompose a set of 3 objects into two parts using concrete manipulatives.
Compose a set of 4 objects from two parts using concrete manipulatives.
Represent number bonds for 4 using pictorial models (e.g., circles, dots).
Identify all number bonds for 5 using concrete objects and pictorial representations.
Explain different ways to share 5 items between two friends using number bonds.

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