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Lesson Plan: Subtracting Ones from Three-Digit Numbers Mathematics
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to model subtracting a one-digit number from a three-digit number and investigate which digits in the number change.
Objectives
Students will be able to
- subtract ones from three-digit numbers without regrouping,
- count back in ones to subtract,
- model subtractions with place value blocks or counters,
- model subtractions on number lines.
Prerequisites
Students should already be familiar with
- the place value of three-digit numbers.
Exclusions
Students will not cover
- numbers above 1,000,
- the column method.
