3 + 2 = 5
2 + 3 = 5
This part-part-whole chart is used for addition. Addition sentences look like this: part + part = whole. Just like an addition sentence, the parts come first in this part-part-whole chart.
Practice
How can we relate addition and subtraction?
Goal:
Goal:
Think About It!
Goal: How do addition and subtraction sentences use the same numbers?
We can use the numbers 2, 3, and 5 to create subtraction sentences, too. Let’s look at the hamsters at the pet store again.
There are 5 hamsters at the pet store. 3 of the hamsters are tan.
Question
How many hamsters are white and brown?
Very good! There are 2 white and brown hamsters.
We know there are 2 white and brown hamsters because 5 - 3 = 2. This subtraction sentence has two parts and a whole. Just like the addition sentences, the tan hamsters make up one part and the white and brown hamsters make up the other part. All of the hamsters together make up the whole.
5 - 3 = 2
Whole - Part = Part
Can you switch the parts to make another subtraction sentence that is related to 5 - 3 = 2?
Insert the subtraction sentence in the blank below. Check your answer by clicking the Check button.
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Great job! We built two addition sentences and two subtraction sentences about the hamsters. All of these number sentences are related because they use the same numbers: 2, 3, and 5. 2 and 3 are the parts, and 5 is the whole. We can organize this information in a part-part-whole chart. A part-part-whole chart is a rectangle with three sections. Two of the sections are labeled “part,” and one of the sections is labeled “whole.” Look at the example below. To move to the next example, click the arrow on the right.
