CCSS 1.OA.4 Sort By Grade Worksheets

CCSS 1.OA.4 (Common Core, 1st Grade): "Understand the relationship between numbers and quantities; connect counting to cardinality." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.

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Operations and Algebraic Thinking Understand subtraction as an unknown-addend problem. 4Understand the relationship between numbers and quantities; connect counting to cardinality.

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Subtraction Relative to Addition

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• 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).