Digit Dog and Calculating Cat are are playing a game called sum or difference.
- Take turns to throw 2 dice.
- Find the sum of the two numbers OR the difference, then cover the number on your grid.
- The first one to cover all their numbers is the winner.
Download the game here
Encourage children to use the mathematical language:
The sum of …….and ………is …………..
The difference between …….. and …….. is………..
Which numbers are more difficult to cover? Why do you think that is?
Do you make some numbers more often than others?
…….you were making your own board? Which numbers do you think would be good to choose?
……you were only finding the sum of the dice? Which numbers would you put on the board so that you were the winner?
………you were only finding the difference? Would you choose the same numbers?
5 Christmas stars,
4 chimney pots,
3 rows and columns,
2 Numicon shapes and
1 Santa’s sleigh………………..
Get your tree and stars here.
Click here for examples of questions and ways to deliver the challenge.
Full challenge here with examples of questions to ask and variations to try.
Click here for the full challenge.
Digit Dog and Calculating Cat are trying one of the Numicon Ideas for Spring resources that they found on www.oxfordowl.co.uk
How can Calculating Cat share the chicks between the 3 nests? Try it.
How many chicks will be in each nest? Convince your friend that you are right.
Write a dividing calculation to go with your representation.
Try different numbers of nests – can you share the 12 chicks equally between 2 nests? What about 4 nests, 5 nests, 6 nests? What do you notice?
Try a different number of chicks. What happens?
Courses Cardiff 2017
Courses North and West Wales 2017
The Two-sided Counters Challenge booklet is now available in English and yng Nghymraeg.
Try this Digit Dog Challenge.
Check out the booklet for ways to develop reasoning skills.
If you try the challenge, let us know how you get on.
The booklet with ideas for teaching and extending Digit Dog’s Hidden Spots Challenge is now available on the booklets page – look in Investigating totals.
A booklet with ideas for extending this challenge will be here very soon.