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Number bonds to 10 and 20 – Year 2 maths lesson

Lesson 6 of 16 in the Year 2 maths course

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

A complete 45-minute lesson for Year 2 (ages 6–7) 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 2 (ages 6–7)
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.

  1. Read what your child will learn and the big ideas together.
  2. Press Start the lesson below and sit with your child for the teaching and the worked examples (about 19 minutes).
  3. 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.
  4. Finish with the exit ticket and the talk question: “If you know 7 + 3 = 10, what else do you know?”
  5. Later that day or the next day: the homework (15 minutes), then a practice test.

Watch out for

  • Counting on from the wrong number (counting the start number again). Start from the first number and count the jumps, not the numbers.
  • Not seeing that 3 + 7 and 7 + 3 are the same fact. Turn the counters round: the total does not change.

Tip for home: Hold up some fingers and ask how many more make 10.

What your child will learn

We are learning to know pairs of numbers that make 10 and 20, and use them to add and subtract.

Success looks like

  • I can say all the pairs that make 10.
  • I can use them to make 20.
  • I can write a fact family.

Key words

number bond
two numbers that make a total
total
how many altogether
fact family
related addition and subtraction facts
part
one of the numbers that make the whole

What to have ready

  • Paper and a pencil
  • This page on a computer, tablet or phone
  • For the hands-on part: Use a ten frame or an egg box with 10 spaces. Fill some spaces with counters and say how many more make 10. No counters? Draw two rows of five boxes on paper.

The big ideas (for the adult)

A number bond is a pair of numbers that make a total, such as 6 + 4 = 10.

If you know 6 + 4 = 10, you also know 4 + 6 = 10, 10 − 6 = 4 and 10 − 4 = 6. These are a fact family.

Bonds to 10 help with bonds to 20: 6 + 4 = 10, so 16 + 4 = 20.

The lesson, step by step

45 minutes in 5 parts
PartTimeHow it is checked
Starter: quick recall5 minMarked by Classfern
Teaching input10 minNot assessed, self-checked
Worked examples and guided practice9 minNot assessed, marked by Classfern
Independent practice15 minMarked by Classfern
Plenary and exit ticket6 minMarked 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

All Year 2 maths lessons and tests · Maths Department

More Year 2 maths lessons

Curriculum

National Curriculum for England, Year 2: “recall and use addition and subtraction facts to 20 fluently, and derive and use related facts up to 100”

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.