Lesson Plan: Column Subtraction of One-Digit Numbers from Two-Digit Numbers Mathematics • Second Year of Primary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to subtract a one-digit number from a two-digit number with and without regrouping and record the calculation in columns using the standard algorithm.
Objectives
Students will be able to
- use place value blocks to model the subtraction of a one-digit number from a two-digit number with and without regrouping and subtract the numbers in place value tables,
- subtract a one-digit number from a two-digit number without regrouping using the standard column method,
- subtract a one-digit number from a two-digit number with regrouping using the standard column method,
- write missing numbers into calculations,
- identify errors in calculations.
Prerequisites
Students should already be familiar with
- place value of two-digit numbers,
- regrouping ones using place value charts and blocks,
- subtracting one-digit numbers from two-digit numbers using models, including regrouping.
Exclusions
Students will not cover
- numbers over 100,
- subtracting using mental methods such as compensation,
- subtracting using number lines.
