Building Numbers: Part-Part-Whole Addition

Year 3 Mathematics Understanding number relationships Making addition meaningful

WALT (We Are Learning To)

Understand that numbers can be split into parts Use part-part-whole to solve addition problems Represent addition using visual models Explain our thinking about number relationships

What do you know about addition?

Think about: What happens when we add numbers together? Can you give me an example? What tools help us add?

What is Part-Part-Whole?

A number can be broken into smaller parts The parts always add up to the whole We can show this with pictures and objects It helps us understand addition better

Hands-On Exploration

Use 8 counters Split them into two groups Record: Part + Part = Whole Try different combinations

Part-Part-Whole Models

Different Ways to Show 6

{"left":"1 + 5 = 6\n2 + 4 = 6","right":"3 + 3 = 6\n0 + 6 = 6"}

Problem Solving Challenge

Sarah has 9 stickers Some are stars, some are hearts She has 4 star stickers How many heart stickers does she have?

Remember

The parts always add up to make the whole! Part + Part = Whole

What Did We Learn Today?

Numbers can be split into parts Parts always equal the whole Many ways to make the same number Part-part-whole helps with addition