One more, one less, ten more and ten less – Year 3 maths lesson

Lesson 2 of 24 in the Year 3 maths course

UK version. UK school years, UK spelling and pounds (£). · US Math Department

A complete 45-minute lesson for Year 3 (ages 7–8) that runs on this page – at school or at home. Every answer is marked straight away, with a worked explanation.

Time: 45 minutes + 15 min homework
Year: Year 3 (ages 7–8)
You need: Paper, a pencil and this page
Marked: Instantly, with explanations

For parents: how to use this lesson

You don't need to know this topic yourself. The lesson explains each step on screen, one tidy step at a time. Every answer is marked straight away with a worked explanation, so you never have to mark anything.

Read what your child will learn and the big ideas together.
Press Start the lesson below and sit with your child for the teaching and the worked examples (about 19 minutes).
Let them do the practice on their own. They choose Getting started, On track or Challenge – start on On track and move up after a few right in a row.
Finish with the exit ticket and the talk question: “When you find 10 more than 47, which digit changes and why?”
Later that day or the next day: the homework (15 minutes), then a practice test.

Watch out for

Changing the ones digit when finding 10 more. Use a hundred square: 10 more is the number straight below.
Getting stuck when the tens go past 9 (95 + 10). Count on in tens with a number line: 95, 105.

Tip for home: Look at door numbers on a walk: what is 1 more, 10 more, 10 less?

What your child will learn

We are learning to find 1 more, 1 less, 10 more and 10 less than a number (and 100 or 1,000 more or less).

Success looks like

I can find 1 more and 1 less.
I can find 10 more and 10 less.
I can explain which digit changes.

Key words

more: a bigger number
less: a smaller number
digit: one of the symbols 0 to 9
tens: the column worth ten each

What to have ready

Paper and a pencil
This page on a computer, tablet or phone
For the hands-on part: Build a number with tens and ones (bundles of ten straws, or sticks of ten cubes). Add one ten, then take one away, and say the new number each time. No blocks? Draw tens as lines and ones as dots.

The big ideas (for the adult)

One more is the next number when you count up. One less is the number just before it.

Ten more changes the tens digit by one: 34 becomes 44. The ones digit stays the same.

The same idea works for 100 more or 1,000 more: only one digit changes, unless you go past 9 in that column.

The lesson, step by step

45 minutes in 5 parts
Part	Time	How it is checked
Starter: quick recall	5 min	Marked by Classfern
Teaching input	10 min	Not assessed, self-checked
Worked examples and guided practice	9 min	Not assessed, marked by Classfern
Independent practice	15 min	Marked by Classfern
Plenary and exit ticket	6 min	Marked by Classfern, self-checked

Starter, "your turn", practice and exit ticket are marked by Classfern. Worked examples and teaching are not assessed. The hands-on task and the reflection are self-assessed. Explanations in talk are judged by the parent and not recorded.

The lesson

It runs here on the page. No sign-up and no names – progress is kept only in this browser.

Homework and practice at home

15 minutes: 8 practice questions, 3 multiple-choice questions and 2 to remember from earlier work, then a short reflection. New questions every time, all marked instantly.

More practice

Year 3 place value testMarked instantly

All Year 3 maths lessons and tests · Maths Department

Curriculum

National Curriculum for England, Year 3: “count from 0 in multiples of 4, 8, 50 and 100; find 10 or 100 more or less than a given number”

Contains public sector information licensed under the Open Government Licence v3.0.

Our lessons and questions are our own. They are not written or endorsed by any government department, testing agency or exam board.