In these counting by twos worksheets, students fill in the missing numbers between 1 and 20. Odd and even sequences are included. There are more missing numbers (less hints) in the later worksheets.
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Counting by 5'sExplore all of our learning numbers worksheets (recognizing and printing numbers), counting worksheets (counting objects, skip counting, counting backwards) and comparing numbers worksheets ("more than", "less than", ordering numbers).
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