Mathematics

Beginner

50 mins

Teacher/Student led

Learning Goals

Learning Outcomes

Lesson Files

+80 XP

What you need:
IWB/Projector/Large Screen

Counting on and Back in 10s and 100s

Count on and back in steps of 1, 10 and 100 from numbers to 1,000, observing which column changes with each jump and what happens when the tens digit rolls over past 9.

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1 Getting Started
2 Watch and Notice
3 Try It Together
4 Build the More and Less in Your Copy
5 Class Challenge
6 What Did We Notice?
7 What's Next
Pupil practice

1 - Getting Started ~4 mins

Key point

Illustration for Getting Started Here is a start number: 240. Let's count on together in tens — 240, 250, 260, 270. As we go, keep your eyes on the number. One part of it keeps changing, but the other parts sit perfectly still. Which part is on the move?

👇 Mark your steps as done as you complete them.

+5 XP

2 - Watch and Notice ~11 mins

Watch each jump on the number line and read the numbers before and after out loud. Keep your eye on the digits, which one changes, and which ones stay still?

👇 Mark your steps as done as you complete them.

+10 XP

3 - Try It Together ~11 mins

Key point

Today we work these jumps together on the board, all starting from 315, one at a time: 10 more than 315, then 100 more than 315, then 10 less than 315, and finally 1 more than 315.

Before each hop lands, the whole class says out loud together which column you think will change. Then the pupil at the board makes the jump and reads the landing number, and we check whether our prediction was right. The last one is small but sneaky — a jump of just one — so watch the units carefully.

Jump from 315

+15 XP

4 - Build the More and Less in Your Copy ~3 mins

COPYBOOK MOMENT

In your maths copy, write each of these two start numbers. Beside each one, write its 1 more, its 10 more, and its 100 more. Read each new number aloud after you write it, and check which column changed. Aim to finish both numbers. Remember 290: when the tens are a 9 and you add ten, they roll over into the hundreds.

If you finish both, write the 10 less and 100 less for each as well.

+10 XP

5 - Class Challenge ~8 mins

Key point

The middle one is the tricky one — the tens are already a 9, so count carefully as they roll over into the hundreds.

Today we work through these reach-the-target jumps together: 100 more than 260, then 10 more than 290, and finally 10 less than 400. The whole class predicts where each jump will land before we check on the board.

Reach the target

+15 XP

Pupil practice

Module 1 · Place Value: Whole Numbers to 1,000 and Rounding Number

Lesson 8 · Counting on and Back in 10s and 100s

Download Activity Book page (PDF)

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Counting on and Back in 10s and 100s

Teacher Class Feed

1 - Getting Started ~4 mins

2 - Watch and Notice ~11 mins

3 - Try It Together ~11 mins

Jump from 315

4 - Build the More and Less in Your Copy ~3 mins

5 - Class Challenge ~8 mins

Reach the target

Unlock the full learning experience

XP