Subtracting Two-Digit Numbers with Regrouping

Imagine playing through 2 levels of your favorite video game. You earn62 pointstotal. In Level 1, you scored28 points.How many did you score inLevel 2?

How can we solve this problem? š¤

We subtract! ā

62 - 28 =?

Do you remember the first step in subtracting two-digit numbers?

Thatās right! You **stack the numbers vertically** with the largest on top!

We start subtracting from the Ones column.

But what happens when the number at the bottom is larger than the number on top? š¤

We can do **regrouping**.

This is how 62 and 28 are grouped.

When we **regroup**, we change the grouping for 62. This lets us take some value from one place, and give it to another place that needs more.

This is also called **borrowing**.

We take one Ten from the Tens column and add it to the Ones column.

Now, we have 5 Tens and 12 Ones at the top of our equation.

We don't have to regroup 28, the number at the bottom.

Now, we can subtract the Ones column.

12 - 8 is 4.Ā

We write that in the Ones place.

Next, letās subtract the Tens.

Remember, you only have 5 Tens left.

5 - 2 is 3.

Our final answer is 34.

You scored 34 points in Level 2.

Great job!

Letās try subtraction one more time.

31 - 15 =?

First, letās write the equation in **column form.**

Great. Can we subtract in the Ones column?Ā

No!

We need to regroup!

Now, letās subtract the Ones.

Great job! Letās do the Tens next.

Thatās it! Good work!

Now you can move on to practice.

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