The student must fill in the missing numbers using their knowledge of the Hundreds Chart. This is a good activity for Kindergarten, First Grade, and Second Grade students who are still working on number sense. This is also good for Third Grade, Fourth Grade, and Fifth Grade to practice 10 more/less, 11 more/less, and 12 more/less than a number, with automaticity. Suggested: Kinder, 1st, 2nd Graders can use a 100's chart. 3rd, 4th, 5th graders must do mental math to complete.