2.2.4 More Practice with the Number Line

Let’s try a few more examples to make sure you are comfortable identifying the numbers.

Activity symbolActivity: Representing Numbers Part II

Sketch the number line provided below in your math notebook and try the following:

This diagram shows a number line marked in intervals of one-tenth from 0 to 2. Vertical arrows are labelled and marked at the following points: B points to halfway between the end of the first and the end of the second interval to the right of zero. A points to the end of the seventh interval to the right of zero. C points to the end of the fifth interval to the right of 1.
Long description

(a) What numbers are indicated by A, B, and C?

Hint symbol

Discussion

Take your time. Refer to the example on the previous screen and trace your steps. Identify the whole number to the left of B: this will be the whole part of the number. Since the unit is broken into ten equal parts, count the tick marks. This will represent the number of tenths, giving you the decimal portion.

Solution symbol

Answer

(a) A marks the number 0.7, B marks the number 0.15, and C marks the number 1.5.

(b) Mark the numbers 0.5, 1.2, and 1.85, on the number line.

Answer

(b) The numbers 0.5, 1.2, and 1.85 are indicated on the number line below.

This diagram shows a number line marked in intervals of one tenth from 0 to 2. Vertical arrows are labelled and marked at the following points: 0.5 points to the end of the fifth interval to the right of zero.1.2 points to the end of the second interval to the right of 1.1.85 points to halfway between the end of the eighth interval and the end of the ninth interval past 1.
Long description

2.2.3 Expressing Numbers

2.2.5 Decimals in Daily Life