An infinite number of correct answers

[lovingboth]

From a SATS key stage 2 (i.e. for 6-7 year olds) practice question...

[Poll #1386206]

Comments

[ciphergoth.livejournal.com]

If you said integers, did you consider answers like -6*-20?

[barakta]

No, you got me on those.

[ciphergoth.livejournal.com]

A useful term here is [[natural number (http://en.wikipedia.org/wiki/Natural_number)]]

[valkyriekaren.livejournal.com]

I've never understood why minus numbers behave that way.

[ciphergoth.livejournal.com]

I'll show you next time we're in the same place. The short answer is: draw a graph of -2x against x and it should be clear!

[valkyriekaren.livejournal.com]

It's OK, I don't think I really need to know why. Multiplying minus numbers in my head isn't something I need to do regularly, anyway.