Discovering Part-Part-Whole in Maths

• Nieuwe lesbewerker

Discovering Part-Part-Whole in Maths

What do you already know about part-part-whole?

Learning Objective

At the end of the lesson you will know how to use part-part-whole models, use pictures to solve addition and subtraction, and find missing parts!

What is Part-Part-Whole?

The part-part-whole model helps us see how two or more parts make a whole number. It is used to help us add and subtract easily.

Seeing Parts and Wholes

Look at this picture. The whole is 6, made of two parts: 4 and 2. We can see how parts fit together!

Finding a Missing Part

When one part is missing, we can use pictures to count and find out what it is. For example, if the whole is 7 and one part is 3, the missing part is 4.

Addition and Subtraction with Models

Put two parts together to make a whole. 3 + 2 = 5.

Subtraction

Addition

Start with the whole. Take one part away to find the other. 5 - 2 = 3.

Try It Yourself!

Use counters or blocks. Make a whole number and break it into two parts. Can you find the missing part if I hide one part from you?

Let's Reflect!

Can you use a part-part-whole model to solve 8, 5 and ? What is the missing part? Draw your model and share your answer!

Write down 3 things you learned in this lesson.

Write down 2 things you want to know more about.

Ask 1 question about something you haven't quite understood yet.