Question

Using Models to Understand Addition

Adding 9 ones and 5 ones will give us ____ ones.

Trade in 10 ones pieces for a _____ piece.

We have a total of 13 tens.

Trade in 10 tens pieces for a hundreds piece.

The sum 1 hundred, 3 tens, and _____ ones.

Or we could write it out as _____

Answer 1

Let's break this down step by step using models to understand addition:

1. Adding 9 ones and 5 ones will give us **14 ones**.

2. Trade in 10 ones pieces for a **ten** piece.

3. We have a total of 13 tens, which means we have **130** (because 13 tens equals 130).

4. Trade in 10 tens pieces for a **hundred** piece.

5. The sum of 1 hundred, 3 tens, and **4 ones** will give us 134 (because 1 hundred is 100, 3 tens is 30, and 4 ones is 4).

6. Or we could write it out as **1 hundred + 3 tens + 4 ones = 134**.

With this understanding, we can see how models help visualize and simplify addition problems!