Learning Objectives
- Understand the "make 10" strategy for addition
- Practice breaking down numbers to make adding easier
- Apply the strategy to add numbers with sums between 10 and 20
Introduction to the Make 10 Strategy
The "make 10" strategy is a powerful way to add numbers mentally. It works by breaking down numbers to create a sum of 10, which is easy to work with.
Why is this useful?
10 is a "friendly number" that makes mental math easier
It helps us add larger numbers quickly
This strategy builds number sense and fluency
Example: 8 + 5
Using make 10, we can break down 5 into 2 + 3
8+5
8+2+3
8 + 2 = 10, then 10 + 3 = 13
So, 8 + 5 = 13