Question

Using Models to Understand Addition

3 ones plus 8 ones is equal to ____ ones.

11 ones is the same as 1 ____ and 1 one. Trade in for a tens piece.

we have 1 ten plus 4 tens plus 3 tens. That's _____ tens.

We end up with 1 hundred, 8 tens and the 1 one or ____.

Answer 1

Let's break down the problem step-by-step using models for better understanding.

1. **3 ones plus 8 ones is equal to**:
- \(3 + 8 = 11\)
- So, **11 ones**.

2. **11 ones is the same as 1 ____ and 1 one**:
- 11 ones can be expressed as 1 ten and 1 one.
- So, we can fill in the blank with **ten**.

3. **We have 1 ten plus 4 tens plus 3 tens. That's**:
- \(1 + 4 + 3 = 8\)
- So, that’s **8 tens**.

4. **We end up with 1 hundred, 8 tens and the 1 one or**:
- This could be expressed in words as **181** (1 hundred, 8 tens, and 1 one).

Putting it all together:

- **3 ones plus 8 ones is equal to 11 ones**.
- **11 ones is the same as 1 ten and 1 one**.
- **We have 1 ten plus 4 tens plus 3 tens. That's 8 tens**.
- **We end up with 1 hundred, 8 tens, and the 1 one or 181**.

This approach helps in visualizing addition and understanding place value.