Round to the Nearest 100 (4-Digit Numbers) (417)

Teaching Notes

Emphasize identifying the tens digit to decide whether to round up or down. Reinforce that digits to the right of the rounding place become zeros.

Vocabulary

Place Value: Value of a digit based on its position.

Nearest Hundred: The closest multiple of 100.

Common Mistakes

• Rounding to the wrong place value (e.g., thousands instead of hundreds).
• Forgetting to change digits to the right of the rounding place to zero.
• Incorrectly applying the '5 or more' rule, especially when a 9 is involved.

Differentiation

Discussion Questions

• Why is rounding numbers useful in everyday life?
• How does knowing place value help when rounding?
• When do we round a number up, and when do we round down?
• Can you think of a situation where an estimate is better than an exact number?

Extension Activities

• Round populations to nearest hundred.
• Round lengths to nearest hundred cm.
• Round weights to nearest hundred grams.

Parent Tip

Have your child round phone numbers to the nearest hundred.

Skill Cluster

Number Sense and Estimation

Estimated Time

15 minutes

Skills Practiced

Prerequisites

• Place Value to Thousands
• Rounding to the Nearest Ten

Next Steps

• Rounding 4-Digit Numbers to the Nearest Thousand
• Estimating Sums by Rounding
• Estimating Sums by Rounding to the Nearest Hundred