Tuesday, 24 June 2014

A Fantastic Trick for Number Bonds

Today we learnt about a really quick way to calculate Number Bonds of up to 100 000.  Mr Spice showed the teachers on Monday afternoon.  To start with some of us had our doubts about how easy it really was.  But, after a few examples, it all became clear.

An example of a question would be 24 + ___ = 100
What we learnt was that the ones column has to add to 10 e.g. 4 + 6 = 10
The tens column (and anything higher, such as hundreds, has to add to 9 e.g. 2 + 7 = 9

So..24 + 76 = 100

Click on the link below to see our examples.  You do need to download the 'Explain Everything Player' but we're working on an easier way.  Everyone in Room 2 can access all maths lessons in their Google Drive.

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