Sam and Holly's problem
Read about Sam and Holly playing a game
Sam and Holly were playing with combinations of numbers that make 10. They started by getting out 10 blocks.
Then, Sam covered some of the blocks and Holly had to work out how many were missing.
Holly decided she to organise what she could see to help her work out what was missing.
She imaged a ten-frame in her head and organised the blocks. This helped her see she needed 3 more to make 10.
Holly and Sam kept taking turns like this until Holly asked Sam if they could make it more challenging for them.
Watch the video to see what happened next
Transcript
Hi Holly.
Hi.
Do you want to play game?
Yeah.
Sure, so we're going to start off - can you just tell me how many are here?
Ten.
Alright, so we, so I'm gonna take some put it under a cup ok. That way it will make it a bit more harder for my brain. Sure, alright, so I'll do this like say, close your eyes. OK, say. Don't peek, close your eyes?
Alright, so how many do you think is left? How many do you think are in here?
A problem for Holly
Sam made this for Holly to think about.
Instructions
Can you help Holly work out how many blocks are hidden?
Can you help her work out how many of the hidden blocks might be underneath each cup?
What are all the possibilities? Record your thinking.
Discuss
What possibilities did you find?
Could you work out exactly what Sam put under each cup for Holly?
Why?
Why not?
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