From the most basic arithmetic right up to some pretty advanced maths, number lines give us a way to directly “see” what’s happening, and therefore understand. Some of the things they can help with are: Addition Subtraction Times Tables Fractions
Put 2 un-cats in a box with 3 cats – how many cats do you have?
Easy: 1 cat
What’s 3 lots of 2 un-cats?
Well, 6 un-cats I guess.
Once we have a way to visualise a problem in maths, it often becomes easy to solve. The above questions demonstrate that 3 + (-2) = 1 and 3 x (-2) = (-6).