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What are number bonds?

4 replies

WinkyWinkola · 11/01/2013 13:39

Ds1 in year 3 is struggling and his teacher asked me to revise with him. I blithely said no problem and hurried on. But I don't have clue. Have wiki'd but no clearer.

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Nicknamenotavailableeither · 11/01/2013 13:46

Number facts to help you add and take away quickly.

So...

0 + 10 = 10
1 + 9 = 10
2 + 8 = 10
3 + 7 = 10

etc...

If you know these then you can add bigger numbers more easily

E.g 17 + 43 = 60 because you know the 3 and 7 go together to make ten.

So you can work on memorising numbers bonds to ten and then twenty (which is easy really if you know those to ten Smile).

Hth Grin

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Nicknamenotavailableeither · 11/01/2013 13:47

Sorry meant to start by saying they are number facts....

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Arithmeticulous · 11/01/2013 13:56

Sing the song, to the tune of Row your boat:
8 and 2 are number bonds,
9 and 1 are friends,
7 and 2, 6 and 4,
5 and 5 are twins.

Luckily There isn't one for up to 20, but it helps.

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WinkyWinkola · 11/01/2013 19:47

Thank you very much.

However to my brain, number bonds don't make it easier for me to learn those up to 100.

I hope it does for ds1 though.

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