Number busting

Watch the video to learn how to play

Transcript

Alright mathematicians, are you ready to have a look at number busting?

So I've got these bits of equipment, I just have to work out how many I have to start with. I'm pretty confident these are tens, so 2 tens and I can see 2 threes which make 6, so I think that's 26 because it's 2 tens in 6 more, which we would rename as 26. I can check that they're tens because if I fan them out a little bit, Ayesha showed me this strategy. I know that 10 is made up of 2 fives and that inside the five is 3 and two more so see 3 and 2 there and 3 and 2 there and so I know that's 10 if I measure that I know that's 10.

So I have 26. So now my goal is to bust it apart and record as many different ways that I can think of to think to rename 26 so I could do 20 and 6 so I could call that 2 tens and 6 ones.

So 26 is... I could also bust it apart by saying 1 ten, another ten and 6 ones, so 1 ten + 1 ten + 6 ones. I could also say, oh, I know I could undo this one here and call all of those ones and say I have 1 ten and 16 ones which is 26.

I could also say and bust these all apart further and say what if I had two groups of 13 that would also be 26, so 13 + 13 and I wonder what else you could come up with in ways of number busting 26.

Collect resources

You will need:

  • 26 items (for example, pasta pieces, counters or pencils)

  • pencils or markers

  • your mathematics workbook.

Instructions

  • Get 26 items (for example, pasta pieces, counters or pencils).

  • Organise and describe your collection.

  • Try to reorganise and describe your collection as many times as you can within the next 5 minutes.

  • Draw and record all of your ways of thinking about your collection.

  • Play number busting again.

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