Two-Digit Fact Families Video

Wyatt, Jesse, and Alma are best friends. Today is the first day of winter break, and look, it snowed! The kids are about to have their first snowball fight of the year. Ready, set, go!

Wyatt started with 34 snowballs and he threw 23 during the snowball fight. How many snowballs does he have left?

To find the number of snowballs he has left, we need to subtract 34-23. Remember to subtract the ones place value first, then the tens. Very good! 34-23=11

Wyatt began with 34 snowballs, so 34 is the whole of this equation. Both 23 and 11 are the parts because together they make up the number 34. 34, 23, and 11 can be used to make a fact family. This fact family triangle helps us keep track of the parts and whole.

Fact families show the connection between numbers, just like this! 34-23=11 and 34-11=23. See how we flipped the parts to make 2 different subtraction sentences? Each of these subtraction sentences is part of the same fact family because they use the same numbers! Since 34-23 = 11, that means Wyatt has 11 snowballs left.

Jesse made more snowballs than Wyatt. He made 59 and threw 35. Jesse wants to know how many snowballs he has left. Let’s use a fact family triangle to help him!

What number goes at the top of the triangle?

That’s right, 59! 59 is the total number of snowballs Jesse began with. Where should we put 35?

What number goes at the top of the triangle?

That’s right, 59! 59 is the total number of snowballs Jesse began with. Where should we put 35?

Very good! 35 is one of the parts, so it belongs at the bottom of the triangle. We can help Jesse find the missing part by subtracting 59-35.

Perfect! He has 24 snowballs left.

Can you help Jesse use the fact family triangle to create a different subtraction sentence for his snowballs? We know 59-35=24. Try flipping the parts.

Nice work! 59-24=35.

Now let’s help Alma. She made the most snowballs. Look at all of them! She made 82 snowballs and threw 50. Let’s help her find how many she has left.

Can you fill in this fact family triangle to solve the problem?

Great job! 82 is the whole, so it goes at the top and 50 is a part, so it goes on the bottom. What is the missing part?

Good thinking! We can subtract 82-50 to find the part. 82-50=32.

Now that we know the parts and whole, can you create the subtraction sentences in this fact family? Remember, you can only use the numbers in the triangle.

Wow, you did it! You used the parts and whole in each number sentence.

Thank you for helping Wyatt, Jesse, and Alma today! You used fact families to show the connection between numbers in subtraction sentences. Great job!