standard_description: Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
problem_activity: Stage 4: Decimals
Required Preparation
Materials to Gather
Number cards 0–10
Materials to Copy
Blackline Masters
Greatest of Them All Stage 4 Recording Sheet

Narrative
Students make decimal numbers less than 1.
Variation:
Students can write digits in the ones and tens place, as well.


aligns: no