Lesson 8 Three-digit Numbers on the Number Line

    • Let’s locate and represent three-digit numbers on the number line.

    Number line. Counting by 100. Starting at 100 and ending at 1000.

Warm-up Choral Count: Count by 10 and 100

Count by 10, starting at 0.
Count by 100, starting at 0.
What patterns do you see?

Activity 1 Label Three-digit Numbers

Problem 1

What do you notice? What do you wonder?

Number line. Scale 0 to 10 by tens. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark, 10.
Number line. Scale 0 to 100 by hundreds. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark,100.
Number line. Scale 0 to 1000 by thousands. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark, 1000.  

Locate and label 30, 300, and 3 on a number line.

Problem 2

Label each point with a number it represents.

  1. Number line. 11 evenly spaced tick marks. First tick mark, 200. Point plotted at seventh tick mark, not labeled. Last tick mark, 300.
  2. Number line. Scale 0 to 1,000 by thousands. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark, 1,000. Point plotted at fifth tick mark.
  3. Number line. Scale 620 to 630 by tens. 11 evenly spaced tick marks. First tick mark, 620. Last tick mark, 630. Point plotted at tenth tick mark.
  4. Number line. Scale 0 to 1,000. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark, 1,000. Point plotted at tenth tick mark.
  5. Number line. Scale 600 to 700 by hundreds. 11 evenly spaced tick marks. First tick mark, 600. Point plotted at second tick mark. Last tick mark, 700.

Activity 2 Represent Three-digit Numbers on a Number Line

Locate and label each number on the number line. Label the tick marks with the numbers they represent if it helps.

  1. 700

    Number line. Scale 0 to 1,000 by thousands. 11 evenly spaced tick marks. First tick mark, 0. Last tick mark, 1,000.
  2. 472

    Number line. Scale 470 to 480 by tens. 11 evenly spaced tick marks. First tick mark, 470. Last tick mark, 480.
  3. 940

    Number line. Scale 900 to 1,000. 11 evenly spaced tick marks. First tick mark, 900. Last tick mark, 1,000.
  4. 356

    Number line. Scale 350 to 360 by tens. 11 evenly spaced tick marks. First tick mark, 350. Last tick mark, 360.
  5. 590

    Number line.

Practice Problem

Problem 1

  1.  Number line. Scale 500 to 600 by hundreds. 11 evenly spaced tick marks. First tick mark, 500. Last tick mark, 600. Point plotted at fifth tick mark, not labeled.

    What number is represented by the point on the number line?

  2. Locate and label 738 on the number line.

     Number line. Scale 730 to 740 by tens. 11 evenly spaced tick marks. First tick mark, 730. Last tick mark, 740.