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Let’s Learn!

Why is it helpful to use fact families?

Goal:

Goal:

thinking monkey

Think About It!

Goal: How can you use fact families to add?

Click to see Sofia and Logan’s beans!

21 beans

24 beans

How can we find how many beans they have in all? We can add!

21 + 24 = ?

Tens and Ones place-value-chart: 2 yellow dots in the tens section, and 1 blue dot in the ones section. Under that, is another 2 yellow dots in the tens section, and 4 blue dots in the oens section.

What is the sum? Use the place-value chart to help.

21 + 24 = ____

That’s right! Sofia and Logan have 45 beans because 21 + 24 = 45. If Logan has 24 beans, how many beans does Sofia have?

24 + ___ = 45

We can find the missing number using a fact family! A fact family is made up of 2 addition sentences with the same whole and parts.

21 + 24 = 45

24 + __ = 45

red arrow pointing to empty space in equation

This is a fact-family triangle. Each number is part of the same fact family. Click on the Show Me button below to see the numbers

triangle outline with 3 blank spaces in each corner.

21, 24, and 45 form a fact family. Click Show Me to see the missing number in the fact-family triangle.

triangle outline with 3 spaces in each corner. At the top corner it shows 45, in the bottom left corner, it shows 24. And, in the right corner, it shows 21.

21+24=45

24+     =45