questions

What's your Mental Maths like at the moment?

�How many do you think you could do in one minute? (Level 1)

And these ? (Level 5)

How about this lot? (Level 10)

Too easy? Then try .... Level 30

(13 + 7) / 2

-10 - 9 -13 + -10

And ........Level 40

Or perhaps....Level 50