Solid number sense at this age and stage is crucial for students, as they begin to work with increasingly larger numbers. Students consolidate their skills and understandings of the 100s chart as they take a walk along these number paths.

With either the support of a 100s chart, or as a solely independent task, students use their ‘1 more, 1 less, 10 more, 10 less’ number knowledge to fill in the blanks.