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One Less within 20 math worksheet for practicing subtraction by finding one less than a given number.

A math worksheet titled "One Less within 20" featuring subtraction problems where students find one less than a given number, with a space for the student's name and a smiley face design.

A math worksheet titled "One Less within 20" featuring subtraction problems where students find one less than a given number, with a space for the student's name and a smiley face design.

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