This Word document contains 24 pages of worksheets. Students will practice identifing and writing numbers that are one more than or one less than a given number. Numbers range from 1 - 100 in increments of 10 or 20 at a time. It is alligned with Common Core standards: -- K.CC.B.4c (Understand that each successive number name refers to a quantity that is one larger) -- K.CC.A.2 (Count forward beginning from a given number within the known sequence (instead of having to begin at 1)