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1st Grade Properties & Fact Families Worksheets

1st Grade Properties & Fact Families: use the commutative and identity properties and connect subtraction to addition. Every worksheet is free, prints as a PDF with an answer key, and can be assigned online. The ones teachers open most are first.

← All 1st grade topics 1.OA.3 1.OA.4

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1st Grade Properties & Fact Families Worksheets - Subtraction Relative to Addition worksheet

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Subtraction Relative to Addition

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Student objectives

Use a known addition fact to figure out a related subtraction fact.
See how addition and subtraction undo each other in the same set of numbers.
Fill in the missing number in an addition or subtraction equation.
Write the matching addition sentence for a subtraction sentence (and vice versa).

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1st Grade Properties & Fact Families Worksheets - Using Commutative Property worksheet

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Using Commutative Property

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Student objectives

See that switching the order of two addends gives the same sum.
Fill in the missing addend to make two addition equations equal.

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1st Grade Properties & Fact Families Worksheets - Using the Identity Property of Addition worksheet

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Using the Identity Property of Addition

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Student objectives

Learn that adding 0 to a number keeps the number the same.
Solve addition equations that include 0 without changing the other addend.
Spot when a sum should stay unchanged because 0 is being added.
Use the identity property of addition to quickly verify simple addition statements.

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1st Grade Properties & Fact Families Worksheets - Combining Addends worksheet

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Combining Addends

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Student objectives

Learn that you can group addends in different ways and still get the same sum.
Fill in a missing number to make an addition equation true.
Use number facts to break apart and combine numbers more easily.

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More 1st grade topics

Addition & Subtraction Facts Within 20 48 Adding Within 100 7 Telling Time 5 Halves & Fourths 1 Addition & Subtraction Word Problems 7 Place Value: Tens & Ones 4 Missing Numbers & True or False Equations 9 Ten More, Ten Less & Subtracting Tens 6 Counting to 120 3 Comparing Two-Digit Numbers 3 Shapes 1 Measuring Length 2 Charts & Data 2

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