The most difficult concept I taught to my 2nd graders was different 2 digit subtraction with regrouping strategies, HANDS DOWN.

These proven strategies helped make two digit addition with regrouping feel easier. Follow these step by step strategies to get your students subtracting 2 digit numbers with ease!

I always make these anchor charts WITH my students. After we make them and practice each strategies a few times, I let them pick the strategy that works the best for them.

If you need more activities to practice 2 digit subtraction with regrouping, check out this all inclusive unit.

#### 1. Subtraction Using Base Ten

Students need to understand base ten and place value before trying this strategy.

Your students should know 10 ones make a ten and that 10 tens make a hundred.

This strategy includes 5 simple steps:

- Draw a tens and ones chart
- Draw the first number
- Cross out the ones from the second number
- REGROUP *if needed!*
- Cross out the tens from the second number

#### 2. Subtraction Using Expanded Form

For some students, this strategy makes regrouping a lot easier to understand.

Subtraction using expanded form follows 4 simple steps:

- Expand both numbers
- Subtract my ONES *Regroup if needed*
- Subtract my TENS
- Solve the final equation

#### 3. Subtraction Using a Number Line

Students will either LOVE or HATE using an open number line.

It depends on their exposure to number lines and skip counting.

This strategy also involves 4 steps:

- Draw a number line
- Plot the first number
- Subtract my tens
- Subtract my ones

Using this activity with a hundreds chart is VERY helpful to students, especially when it comes to regrouping.

#### 4. Subtraction Using the Standard Algorithm

While this strategy might seem “easy” to adults, students have a hard time really understanding what is happening when using the standard algorithm to subtract.

Typically, I introduce this strategy last.

Subtraction using the standard algorithm involves just 2 steps:

- See if I need to regroup
- Subtract My ones
- Subtract My Tens

The most important thing to practice here is making sure students start with their ONES and not their tens!

#### BOX IT

This strategy is simply for subtracting from 100.

It is used at the same time as the standard algorithm.

- Box the 10
- Regroup
- Subtract Ones
- Subtract Tens

#### Resources to Practice

- Addition and Subtraction Unit (6 weeks)
- DAILY 2 Digit Subtraction Fluency
- 2 Digit Subtraction Math Centers

#### Closing Thoughts

Which 2 digit subtraction strategies with regrouping or without regrouping help your students the most?

Need the same concept for addition? Hop over to my 2 Digit Addition Strategies.

Drop them in the comments below!