Lesson Plan: Subtracting Ones from Teen Numbers: Making Ten 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 teen number when we cross a ten by subtracting the ones in two steps.
Objectives
Students will be able to
- partition single-digit numbers,
- subtract a part of a one-digit number to reach ten and then subtract the remaining part.
Prerequisites
Students should already be familiar with
- reading and writing numbers up to 20,
- subtracting numbers up to 10.
Exclusions
Students will not cover
- subtracting from a number greater than 20.