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3rd Grade Math
10. 3.NBT.A.3
10.5 Simplifying Addition by Separating
Simplifying Addition by Separating
What You'll Learn
Decompose numbers into place values (hundreds, tens, and ones)
Apply place value separation to simplify addition problems
Add numbers by breaking them into manageable place value parts
Recognize how separating digits makes mental math easier
What You'll Practice
1
Splitting two and three-digit numbers into place values
2
Adding numbers up to 999 using separation strategy
3
Filling in missing place values in separated addition problems
Why This Matters
Breaking numbers into place values is a mental math strategy that helps you add quickly and accurately without a calculator. This foundational skill builds number sense and prepares you for multi-digit operations throughout your math education.
This Unit Includes
1 Video lesson
Practice exercises
Skills
Place Value
Addition
Mental Math
Number Decomposition
Number Sense
TN Curriculum Aligned