Rewrite 2-digit addition problem

What are the two different ways to write addition problems?

Horizontal 2-digit addition

Big image

Vertical 2-digit addition

Big image

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)

How did you line up the two numbers you wrote?

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!

Rewrite 25 + 8 vertically.

Share and Show:

Do number 7 & 8 first, then go back and do 1 - 6.

Make sure you read the direction carefully!

Group Time

Group 1 and 2 --> Do Page 281 number 9 - 21

--> Reteach worksheet 4.8


Group 3 --> work with Ms. Yeung

RTI 4.8

On Your Own --> do odd numbers only

Wrapping Up/ Exit Slip

How can you rewrite the addition problem for 34 + 12 ?


17 + 5 = ?


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