2 digit addition strategies are hard. Add in regrouping, and it might even feel impossible.

For each strategy, I make an anchor chart with the class. I then allow them to practice these equations for an entire day.

After they try each strategy a few times, I allow them to pick the strategy that works the best for them.

#### 1. Addition Using Base Ten

The most important part of this strategy is for students to understand base ten before trying it.

They need to know 10 ones makes a ten and that 10 tens make a hundred.

For this strategy, students will follow 4 simple steps:

1. Draw a tens and ones chart
2. Draw the first number
3. Draw the second number
4. Count the tens, then ones *REGROUP – if needed

#### 2. Addition Using Expanded Form

This strategy works really well for students who need to see things more concretely than using base ten blocks.

Addition using expanded form follows 4 simple steps:

1. Expand the first number
2. Expand the second number
3. Add my ONES then my TENS
4. Solve the final equation

#### 3. Addition 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:

1. Draw a number line
2. Plot the bigger number

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

#### 4. Addition Using the Standard Algorithm

While this strategy might be “standard” to us, it might not be the first choice for students.

It also doesn’t provide them with a concrete understanding of what is actually happening when you are adding these numbers.

For those reasons, I recommend introducing this strategy last.

Addition using the standard algorithm involves just 2 steps: