Lesson Plan: Subtracting Parts of a Whole | Nagwa Lesson Plan: Subtracting Parts of a Whole | Nagwa

# Lesson Plan: Subtracting Parts of a Whole Mathematics • 4th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use visual models to subtract two parts of a whole, where the corresponding fractions have the same denominator.

#### Objectives

Students will be able to

• use concrete and pictorial representations to subtract a fraction from another fraction with the same denominator within one whole,
• recognize that only the numerator changes when fractions with the same denominator are subtracted (the number of equal parts in the whole stays the same),
• write and complete subtraction sentences,
• apply knowledge of subtracting parts of a whole when solving word problems.

#### Prerequisites

Students should already be familiar with

• adding parts of a whole,
• fractional notation, including understanding the roles of the numerator and denominator,
• unit and nonunit fractions up to 1.

#### Exclusions

Students will not cover

• subtracting from fractions that are greater than 1,
• subtracting fractions with different denominators.