# Differentiated First Grade Subtraction to 20 Worksheets

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Common Core Standards
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26 MB|165 pages
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165 Differentiated Subtraction to 20 Strategy Worksheets aligned specifically to the First Grade Common Core. Example problems with explanations and student directions included at the top of each worksheet to support student independence. Covers whole numbers 10-20.
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***PLEASE NOTE*** These worksheets are included in my First Grade Subtraction to 20 Unit.
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***SAVE BIG WHEN YOU BUNDLE*** Receive 2 FREE Worksheet Sets when you Bundle First Grade Math WORKSHEETS Bundle.
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Click the PREVIEW button above to see more example worksheets!

3 Differentiated Levels: Level 1 worksheets include embedded student supports to help struggling mathematicians reach each learning target. Level 2 worksheets remove the extra student supports to allow students to complete the mathematical processes on their own. Level 3 worksheets offer challenge problems for proficient students.

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Concepts covered include:
Pictorial Subtraction
Subtraction Strategies: Counting Back, Decomposing Numbers, Twenty Frames, Number Bonds, Using the Relationship between Addition and Subtraction,
Determining the Meaning of the Equal Sign & Deciding if Equations are True of False.
Subtraction Fact Mastery
Solving Subtraction Word Problems
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Common Core Math Standards Covered:
CCSS.MATH.CONTENT.1.OA.A.1
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

CCSS.MATH.CONTENT.1.OA.B.4
Understand subtraction as an unknown addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.

CCSS.MATH.CONTENT.1.OA.C.5
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

CCSS.MATH.CONTENT.1.OA.C.6
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.

CCSS.MATH.CONTENT.1.OA.D.7
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.

CCSS.MATH.CONTENT.1.OA.D.8
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
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