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Chapter 4.2
Subtraction facts up to 20
What You'll Learn
Recognize the relationship between addition and subtraction facts
Apply subtraction strategies to solve problems with numbers up to 20
Identify related subtraction facts from given addition equations
Build automatic recall of basic subtraction facts within 20
What You'll Practice
1
Selecting related subtraction facts from addition equations
2
Solving subtraction problems with minuends up to 20
3
Matching fact families within 20
Why This Matters
Mastering subtraction facts up to 20 builds the foundation for all future math. Quick recall of these facts helps you solve multi-digit subtraction, word problems, and mental math efficiently in school and everyday situations like handling money or measuring.
This Unit Includes
Practice exercises
Skills
Subtraction
Fact Families
Number Sense
Mental Math
Basic Operations
NY Curriculum Aligned
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