Mathematics
Beginner
50 mins
Teacher/Student led
Learning Goals
Learning Outcomes
Lesson Files
+80 XP
What you need:
IWB/Projector/Large Screen

Rounding to the Nearest 100

Learn to round three-digit numbers to the nearest hundred by looking at the tens digit. Apply the halfway rule to numbers that sit exactly between two hundreds.

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    1 - Getting Started ~4 mins

    Illustration for Getting StartedA big crowd of 340 people is at a hurling match. Is that nearer to three hundred people, or nearer to four hundred people? Have a think, then show me with your hands: three hundred, or four hundred?

    👇 Mark your steps as done as you complete them.

    +5 XP

    2 - Watch and Notice ~9 mins

    The number line runs from 300 to 400, marked every ten. Think about where numbers sit on a line and which hundred each is closer to. The tens digit is our clue for which way it rounds.

    👇 Mark your steps as done as you complete them.

    +10 XP

    3 - Try It Together ~11 mins

    Today we work through these numbers together, rounding each to the nearest hundred: 210, then 290, then 640, then 750. Watch the tens digit each time. The last one lands exactly halfway, so predict before we place it which hundred it will jump to.

    Round to the nearest hundred

    +15 XP

    4 - Write the Rounding in Your Copy ~3 mins

    COPYBOOK MOMENT

    In your maths copy, write each of these numbers and its nearest hundred beside it. Underline the tens digit you used to decide.

    • 230
    • 460
    • 550
    • 970
    +10 XP

    5 - Class Challenge ~8 mins

    Today we round these together on the board, each one a little trickier: 230, 460, 550, 970. Watch for the halfway one, and watch the last one — when a number rounds up past 900, where does it land?

    Round to the nearest hundred

    +15 XP
    Pupil practice
    Module 1 · Place Value: Whole Numbers to 1,000 and Rounding Number
    Lesson 10 · Rounding to the Nearest 100
    Download Activity Book page (PDF)
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