Lesson Plan

Metric Measurements, Fractions and Number Lines

Teach your students to calculate fractions of 100 using a number line model.
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Learning Objectives

Students will be able to calculate fractions of metric units using number lines.

Introduction

(5 minutes)
  • Ask, “What two numbers can we multiply together to get 100?” Note how these are called factors of 100.
  • Mention to your class that any factor for a given number divides that number evenly.
  • Demonstrate by writing a multiplication fact family for 100 as: 4 x 25 = 100, 25 x 4 = 100, 100/4 = 25. Hence, 4 and 25 divide 100 evenly.
  • Allow your class to think, pair and share their thoughts on any other factors for 100.
  • Have your students share whole class, confirm and post the factors for 100 as: 1, 2, 4, 5, 10, 20, 25, 50, 100.
  • Tell your students that finding factors, will be one strategy used to find fractions and equivalent measurements to 100.