Represent Numbers – Decimals beyond Hundredths on Number Lines . Number lines are effective models for representing numbers in relation to other numbers. This makes a number line a good tool for comparing and ordering numbers. . Positioning numbers on number lines requires the line to be partitioned into equal parts. Then it is the length of each section that represents the numbers. Numbers between consecutive 1-digit whole numbers on a number line will be decimals (or fractions). . On any numbe