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Hands-On

How do we use a number line with 100s to round?

Goal:

Goal:

thinking monkey with bulls eye target

Practice!

Goal: Use a number line to round.

Let’s round to the nearest 100!

What is 648 rounded to the nearest 100?

The benchmark numbers jump by 100s from 0 to 1,000. 648 is between 600 and 700. Which benchmark number is it closest to?

Number line: 600 through 700, with a dot on 648.

Let’s check that on our thousand chart. Circle the 6 and underline the 4 in 648.

648

648 has 6 hundreds and 4 tens. Find a number on the chart that has the same digits. Click Show Me to check your work!

640 also has 6 hundreds and 4 tens.

Thousand Chart: 100's columns are highlighted, and an arrow on top of the chart, pointing left and right to the chart. 610, 620, 630 are highlighted in green. 640 is highlighted in orange. And, 600 is circled in red.

1. Can you round 648 to the nearest 100?

  1. 700
  2. 650

Summary

Questions answered correctly:

Questions answered incorrectly:

Practice rounding to the nearest 100. When you are done, turn in your assignment to your teacher with your Weekly Written Work.

Number Line and Thousand Chart