# Rewrite 2-digit addition problem

### What are the two different ways to write addition problems?

## Horizontal 2-digit addition

## Vertical 2-digit addition

## Model & Draw

**Add 28 + 45 = ?**

**Step 1: **

**For 28, write the tens digit in the tens column.**

**Write the ones digit in the ones column.**

**Repeat for 45.**

**Step 2:**

**Add the ones**

**Regroup if you need to**

**Add the tens.**

## Listen and Draw

**1. Juan's family drove 32 miles to his grandmother's house. Then they drove 14 miles to his aunt's house. How many miles did they drive?**

**2. Max's family drove 12 miles to the beach and then drove 8 more miles to the snack bar. How many miles did they drive?**

**3. Ms. Steven drove 23 miles to visit her best friend. Then she drove 23 miles back home. How many miles did she drive?**

**4. Mrs. Morgan drove 45 miles to the space museum. Then she drove 49 miles to visit her sister. How many miles did she drive?**

## Sample Math Talk:

**How are the two problems alike? How are they different? **

**(vertical and horizontal addition sentence)**

**Why is it important to line up the digits of these addends in columns?**

What can happen if you line up the digits incorrectly when you rewrite addition problems?

## Try it out!

## Share and Show:

**Make sure you read the direction carefully!**

## Group Time

--> Reteach worksheet 4.8

Group 3 --> work with Ms. Yeung

RTI 4.8

On Your Own --> do odd numbers only

## Wrapping Up/ Exit Slip

17 + 5 = ?

Math Journal: What will happen if you line up the digits incorrectly when you rewrite the addition problems?