Chapter 2.2
Adding with doubles up to 100
What You'll Learn
Recognize doubles as addition problems where both addends are the same number
Calculate sums of doubles quickly using number patterns up to 100
Apply near doubles strategy by adding doubles and adjusting by one
Identify when a problem is a double or near double to solve efficiently
What You'll Practice
1
Adding doubles like 25 + 25, 38 + 38, and 47 + 47
2
Rewriting near doubles as doubles plus or minus one
3
Solving addition problems using the doubles strategy
Why This Matters
Mastering doubles and near doubles gives you a powerful mental math shortcut that makes addition faster and easier. This strategy builds number sense and helps you solve problems quickly without always relying on paper or calculators, a skill you'll use daily.
This Unit Includes
Practice exercises
Skills
Doubles
Addition
Mental Math
Number Sense
Fact Fluency
