Tuesday

Doubles and Reverse Doubles

Take a look at this poster, full of doubles facts from the real world:
 

Play these games to check you know your doubles: 

- Doubles Archery 2


- Hit the Button, click on doubles. Aim for 30 correct answers with 100% accuracy. 

Near Doubles

You can also use near doubles for speed and use your doubles for extra help: e.g. 5 + 6 = 5 + 5 + 1 Play this game to learn your near doubles: Dinosaur (near) doubles.

Reverse Doubles

Now practice your Reverse Doubles: these help heaps with subtraction!


E.g. 6 + 6 = 12
So 12 - 6 = ?


That's right:
12 - 6 = 6.


5 + 5 = 10.
10 - 5 = ?


7 + 7 = 14
14 - 7 = ?


9 + 9 = 18
18 - 9 = ?

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