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Number bonds and mental maths, from tonight’s homework

Number bonds to 10 and 20Doubles to 20

Photograph ‘number bonds to 10’ or ‘doubles and halves’ in the homework diary. Kamelo turns it into about ten minutes of quick questions, such as 6 + ? = 10, answered on a big number pad. You check everything first.

Year 1 to Year 6

From the photo to the practice

  1. You photograph the homework

    The line in the homework diary, a worksheet or a screenshot from the school app.

  2. You check what Kamelo read

    About thirty seconds later you see the exercise he found, such as number bonds to 10 or doubles. Adjust it if needed, then confirm.

  3. Your child practises

    Today’s homework is waiting on their screen: about ten minutes of quick questions on exactly that skill.

During the session

The missing number
Number bonds come as missing-number questions: 6 + ? = 10, or 30 + ? = 100. Your child answers on a big number pad.
Facts within 20
Additions and subtractions within 20 come as quick sums, never the same fact twice in a row.
Doubles, halves and tens
Other mental maths homework has its own questions too: doubles, halves, near doubles, adding or taking away tens, multiplying by 10 or 100, rounding to the nearest ten.
An ‘almost’ comes back
After a miss, Kamelo shows the right answer, and the fact returns a few questions later, at most twice. Nothing is marked in red, and there is no clock by default.

Number bonds at home, without a screen

  • Use fingers, then let go of them

    Ten fingers make number bonds to 10 visible: fold down 3, see 7. Once that is quick, move on to saying the pairs aloud.

  • Say the pairs as a pattern

    ‘1 and 9, 2 and 8, 3 and 7…’ A pattern is easier to hold on to than ten separate facts.

  • Link 10 to 100

    If 3 + 7 = 10, then 30 + 70 = 100. Showing your child the link saves learning a whole new set of facts.

  • Spot bonds in everyday life

    Change from £1, the minutes left until the hour, how many more plates for the table: all of them are number bonds.

Questions parents ask

What are number bonds?
Pairs of numbers that make a given total, such as 7 and 3 for 10, or 45 and 55 for 100. In England, Year 1 pupils learn number bonds within 20, and the national curriculum expects them to know their number bonds to 20 by the end of Year 2. They are the basis of quick mental addition and subtraction.
What are the number bonds to 10?
0 + 10, 1 + 9, 2 + 8, 3 + 7, 4 + 6 and 5 + 5, and the same pairs the other way round. Children use them to add and subtract quickly, for example 8 + 5 = 8 + 2 + 3. Kamelo practises them as missing-number questions, like 4 + ? = 10.
How do number bonds to 20 and 100 work?
They build on number bonds to 10. If 3 + 7 = 10, then 13 + 7 = 20 and 30 + 70 = 100. The national curriculum asks Year 2 pupils to recall addition and subtraction facts to 20 fluently, and to use related facts up to 100.
Can Kamelo help with other mental maths homework?
Yes: doubles and halves, near doubles, adding or taking away tens, multiplying by 10 or 100 and rounding to the nearest ten. If the photo shows homework Kamelo can’t practise yet, it becomes a task to tick off, and you can send it to us from the app so we can add it.

Official sources

Tonight’s homework, without the fight.

Planned for the UK in January 2027. France comes first, from October 2026.

An email on launch day

Kamelo isn’t in the app stores yet. Leave your email and we’ll let you know the day it’s available on the App Store or Google Play.

Your phone

Just that one email, then your address is deleted. No newsletter, no account to create. Planned for the UK in January 2027. France comes first, from October 2026.