Читать книгу Algebra I All-in-One For Dummies - Mary Jane Sterling, Mary Sterling Jane - Страница 23

A number line is labeled with numbers that increase as you move from left to right. And numbers are listed with an equal amount or value between any two consecutive numbers.

Numbers are placed on a number line to give you a visual picture of how they compare, how far apart they are, and what is missing between them. The two number lines shown here are examples of some versions that are possible. In Figure 1-1, you see the half-way mark indicated between units. And in Figure 1-2, the negative and positive integers are shown, with 0 in the middle.

FIGURE 1-1: A number line from 0 to 5 with half-unit increments.

FIGURE 1-2: A number line from –10 to 10 with one-unit increments.

Q. Place the numbers on a number line.

A.

Note that the marks representing these numbers on the number line are marked with dots or points. The points for the fraction and decimal numbers are approximated, because the tickmarks for these numbers aren’t on the number line to make them exact.

7 Place the following numbers on the number line:

8 Place the following numbers on the number line: