# Lesson Plan: Adding on a Number Line to Subtract Numbers up to 100 Mathematics • 2nd Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to count forward on number lines to find the difference between two numbers up to 100.

#### Objectives

Students will be able to

- count forward along a number line (from the subtrahend to the minuend) to find the difference between two numbers,
- use partitioning to help subtract across a 10,
- apply knowledge of subtracting using a number line when solving word problems.

#### Prerequisites

Students should already be familiar with

- subtracting from two-digit numbers by counting backward using number lines,
- partitioning to help with calculations.

#### Exclusions

Students will not cover

- subtracting from three-digit numbers.