# minecraft problem posing (subtraction) - teacher copy

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Instead of envelopes teachers will be given a paper ‘fortune teller’ which will have all the information the kids need... Top side Bottom side Groups of three will be determined by which card each child gets: https :// docs . google . com / document / d / 1 AvqgYgaQuOaOIvopV _ GuBX 7 cCEER 7 PR 9 dv 7 trRR 6 LnQ / edit Zombies Zombies Zombies TNT TNT TNT Creepers Creepers Creepers Pick-Axe Pick-Axe Pick-Axe Guards Guards Guards Elves Elves Elves Spiders Spiders Spiders Cubes Cubes Cubes Trees Trees Trees

Post on 30-Oct-2014

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Instead of envelopes teachers will be given a paper fortune teller which will have all the information the kids need... Top side

Bottom side

Groups of three will be determined by which card each child gets: https://docs.google.com/document/d/ 1AvqgYgaQuOaOIvopV_GuBX7cCEER7PR9dv7trRR6LnQ/edit Zombies TNT Creepers Pick-Axe Guards Elves Spiders Cubes Trees Zombies TNT Creepers Pick-Axe Guards Elves Spiders Cubes Trees Zombies TNT Creepers Pick-Axe Guards Elves Spiders Cubes Trees

Grass Wheat Chickens Eggs

Grass Wheat Chickens Eggs

Grass Wheat Chickens Eggs

1.Question 1 questions: How many blocks was the fence originally? 131 How many blocks did the creepers destroy? 89 Answer: 42 Groups can not advance to the next extension questions unless they have shown two strategies to work this out. (at this point we will accept an algorithm as one)

Extension questions:

2.

After the creepers bombed the fence they then moved onto the building. How many

blocks were left in the building? Question 2 questions: How many blocks were in the building originally? 1233 How many blocks did the creepers destroy? 388

Answer: 845 Groups can not advance to the next extension questions unless they have shown two strategies to work this out. (at this point we will accept an algorithm as one)

3.

James had to use a variety of partial blocks to build the window frames. The creepers

bombed one of these as well. How many blocks were left?

Question 3 questions: How many blocks were in the window frame to begin with? 13.32 How many were destroyed? 0.77 Answer: 12.55

Groups can not advance to the next extension questions unless they have shown two strategies to work this out. (at this point we will accept an algorithm as one)

4.

Using all the information you have, figure out how many blocks James needs to return

his fence and building to the way it was before the creepers arrived? (NB the window frames are included in the building total so dont worry about them)

Answers: Total blocks originally 131 1233 1364

Total blocks destroyed 89 388 477 Answer: 1364 - 477 = 887