Chapter 3- Apply Subtraction Concepts
3-1 Count Back to Subtract: I can count back to find the difference.
3-2 Subtract All and Subtract Zero: I can subtract all or none to find the difference.
3-3 Use Doubles to Subtract: I can use doubles facts to find the difference.
3-4 PSS: Guess and Check: I can use guess and check to solve problems.
3-5 Relate Addition to Subtraction: I can subtract from numbers through 20 using addition. I can identify and write different ways to name the same number.
Vocabulary: Related facts: a collection of 3 numbers that make up addition and subtraction facts. Inverse: operations that undo each other.
Vocabulary: Missing Addend: a number that is absent from an addition sentence.
3-7 Fact Families: I can identify and write fact families.
Vocabulary: Fact Family: a group of related facts.
3-8 PSS: Choose a Strategy: I can choose the best strategy to solve problems.