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Printable math worksheet titled "Addition Facts to 20 Sheet 6" designed for practicing mental addition of three single-digit numbers, featuring 24 problems and a challenge question at the bottom.

Addition facts worksheet for practicing adding three single-digit numbers mentally, titled "Addition Facts to 20 Sheet 6" with 24 problems and a challenge question.

Addition facts worksheet for practicing adding three single-digit numbers mentally, titled "Addition Facts to 20 Sheet 6" with 24 problems and a challenge question.

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(view all three digit addition worksheet first grade)

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