Lesson 14 Multiples of 100

    • Let’s explore multiples of 100 and how other numbers relate to them.

Warm-up Estimation Exploration: Marching Band

How many people are in the marching band?

Marching band on the field.

Record an estimate that is:

too low

about right

too high

Activity 1 About 100? Close to 100?

Here are the numbers of people in different parts of a school at noon during a school day.

  • playground: 94

  • cafeteria: 163

  • art room: 36

  • library: 13

  • classrooms: 216

  • gymnasium: 109

  • music room: 52

  1. Where in the school would you say that there are about 100 people?

    Record the numbers in the table. Be prepared to explain your reasoning.

    about 100

    not about 100

  2. Now decide if the number of people in each part of the school is close to 0, close to 100, or close to 200.

    If you don’t think a number belongs in any column, set it aside. Be prepared to explain your reasoning.

    close to 0

    close to 100

    close to 200

Activity 2 Close to Multiples of 100

Your teacher will assign a set of numbers to you.

A

94

36

109

163

229

B

24

52

216

11

481

C

187

135

67

83

241

D

332

154

408

296

45

E

279

205

377

449

73

Problem 1

Work with your group to decide on which number line each number should go. Then, locate and label each number on the number line.

Number line. Scale 0 to 100 by 100's. Evenly spaced tick marks.
Number line. Scale 100 to 200 by 100's. Evenly spaced tick marks.
Number line. Scale 200 to 300 by 100's. Evenly spaced tick marks.
Number line. Scale 300 to 400 by 100's. Evenly spaced tick marks.
Number line. Scale 400 to 500 by 100's. Evenly spaced tick marks.

Problem 2

  1. Locate and label 364 on the correct number line.

  2. Name two multiples of 100 that are closest to 364.

  3. Of the two multiples of 100 you named, which one is 364 closer to?

Problem 3

Write the numbers assigned to you earlier. For each number, name the nearest multiple of 100.

number

nearest multiple of 100

Practice Problem

Problem 1

  1. Locate and label 539 on one of the number lines.

    Number line. Scale 500 to 600 by 100's.
  2. What is the closest multiple of 100 to 539?