Well I guess I'm really lucky because I didn't really know about this part of the homework for the weekend, so that little gut feeling saved me there. Since we did our test, that means that were starting a new unit which is most likely the so-called "Rational Numbers". I'm pretty sure that we learnt this last year but I obviously forgot, but I looked it up.
Rational Numbers- Means that specific numbers that can be written as a fraction or ratio with 2 integers. An easy example is 5, five can be written like so= 5/1.
(Just so you know)Integers- Integers are all whole numbers and their opposites like 1,2,3,4,5 or -1,-2,-3,-4,-5 (got the definition from Mr.B's comment on Joseph's Rational Numbers post)
Irrational Numbers- The absolutley opposite meaning of Rational Numbers. An example you can try out is the square root of 7 because the decimal keeps going on and on. Which means you can't write a ratio or fration with irrational numbers.