1. 1-3
Example 1
A tricycle has 3 wheels. How many wheels are on 7 tricycles?
1. Each tricycle has 3 wheels.
Lesson 1-3 Example 1

2. 1-3
Example 1
A tricycle has 3 wheels. How many wheels are on 7 tricycles?
2. One rule is “add 3 for each tricycle.”
= 21
Lesson 1-3 Example 1

3. 1-3
Example 1
A tricycle has 3 wheels. How many wheels are on 7 tricycles?
3. Another rule is “multiply by the number of tricycles by 3.”
7 × 3 = 21
Lesson 1-3 Example 1

4. 1-3
Example 1
A tricycle has 3 wheels. How many wheels are on 7 tricycles?
4. No matter which rule is used, there are 21 wheels on 7 tricycles.
Lesson 1-3 Example 1