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Number Bonds (10-20)
Learning Objective: To know the number bonds for 10
and 20.
What are number bonds?
What are number bonds?
A good way to remember what number bonds are is to think of number family.
What are number bonds?
A good way to remember what number bonds are is to think of number family.
What are number bonds?
A good way to remember what number bonds are is to think of number family.
Child Child Parents
What are number bonds?
A good way to remember what number bonds are is to think of number family.
It's like a game. You have to add the 2 child numbers up to get the parents number.
Child Child Parents
Let's find the number bond for 10
? 10?
Let's find the number bond for 10
? 10?
For the first box, you can pick a number between1 and 9.
Let's find the number bond for 10
1 10?
We are going to start off with 1.
Let's find the number bond for 10
1 10?
There are 2 ways to find out how to get the answer.Whichever way you find easy, you can use.
Let's find the number bond for 10
1 10?
The first way is to use your fingers to count from1 to 10. Work out the answer using your fingers.
Let's find the number bond for 10
1 10?
The answer you should have got is 9.
Let's find the number bond for 10
1 109
Your answer goes in the second box.
Let's find the number bond for 10
1 109
To make sure your correct, add 1 and 9 together.
Let's try some on our own1)
2)
3)
4)
2 10?
4 10?
3 10?
5 10?
Answers1)
2)
3)
4)
2 108
4 106
3 107
5 105
Working out the other answers
Working out the other answers
So we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Working out the other answers
So we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Take this example:
2 108
Working out the other answersSo we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Take this example:
All you have to do it swap the red and thegreen box.
2 108
Working out the other answersSo we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Take this example:
All you have to do it swap the red and thegreen box.
2108
Working out the other answersSo we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Take this example:
All you have to do it swap the red and thegreen box.
2108
Working out the other answers
So we only went up to 5 in that exercise, thisis because 6,7,8 and 9 are easy to work out.
Take this example:
All you have to do it swap the red and thegreen box.
2 108
Working out the other answers
So all you have to do is work out 1-5 and then 6-9 is easy to work out.
2 108
Let's try some on our own
? 106
? 107
? 108
? 108
1)
2)
3)
4)
Answers
4 106
3 107
2 108
1 108
1)
2)
3)
4)
Working out number bonds to 20
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 106
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 206Firstly, we change the blue
box from 10 to 20.
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 206
Secondly, in this example, thequestion wants you to work out
16+ ? = 20.
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 2016All you need to do is add a 1
in front of this 6. So it makes 16.
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 2016Now work it out. Does 16+4=20?
Working out number bonds to 20
This process is really easy now you have learnt number bonds to 10.
This is what you can do:
4 2016Yes it does. And thats how youwork out number bonds to 20.
Plenary
Plenary
In your books, write down:
• A number bond of 10
Plenary
In your books, write down:
• A number bond of 10• A number bond of 20
Plenary
In your books, write down:
• A number bond of 10• A number bond of 20 Turn to your learning objective:
Plenary
In your books, write down:
• A number bond of 10• A number bond of 20 Turn to your learning objective:• RAG your work (red,amber or green)
Thank you for using my lesson.
Created by: coolteacher2276
To find more of my lessons, on slideshare.
Subjects I do are: English, Maths, Biology,Chemistry, Physics, History, Drama and Art.
