1Numbers1 1.1Introduction1 1.2Realnumbers1 1.3Modulus3 1.4Functionswithmultipleoperations4 1.5Commutativeandassociativelawsofaddition andmultiplication5 Summary7 Endofunitquestions8 2Fractions,PercentagesandRatios9 2.1Introduction9 2.2Fractions—rationalandirratio