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1st Grade Math
12. 1.NBT.C.4
12.5 Addition strategies
Addition Strategies for Adding Numbers Quickly
Discover simple addition strategies such as counting on, doubles, and making ten that help you add numbers quickly and confidently.
What You'll Learn
Apply counting on to add a small number by moving forward one step at a time, such as \(8+3=11\).
Recognize doubles facts like \(6+6=12\) and use them to solve near-doubles such as \(6+7\).
Decompose a number to make a ten, rewriting \(8+5\) as \(8+2+3=10+3=13\).
Use a number line to show each jump clearly and check that the total lands on the correct value.
Break apart numbers by place value to add tens and ones separately before combining them.
Choose the most efficient strategy for a problem instead of always using the same method.
What You'll Practice
1
Breaking two-digit addition into tens and ones
2
Identifying equivalent addition expressions using place value separation
3
Solving problems by adding place values separately
Why This Matters
Addition strategies using place value separation build your number sense and mental math skills. This foundational technique makes adding larger numbers easier and prepares you for multi-digit operations, estimation, and problem-solving throughout math.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Place Value
Addition
Mental Math
Number Sense
Two-Digit Numbers
OH Curriculum Aligned