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1.4 Positive and Negative Decimals
LEARNING
STANDARDS CHAPTER
How do you represent positive and negative Represent positive and
decimals on a number line? negative decimals on 1
number lines.
7 Classroom
Flip

Aim: To explore the representation of positive and negative decimals on a number
line.

Instruction: • Explore by yourself before the lesson begins and discuss in groups
of four during the lesson.
• Open the folder downloaded from page vii.

1. Open the file Decimal number line.ggb using GeoGebra.
2. Click and drag the slider ‘Tenth’ and ‘Hundredth’ to define a decimal.

3. Click at the button ‘Change Sign’ to interchange between positive and negative.
4. Observe the position of the decimal defined on the number line.

5. Discuss the position of a decimal on a number line.

Representation of decimals on a number line is the same as that of integers and fractions.
Positive decimals are decimals more than zero whereas negative decimals are decimals
less than zero.
–0.5 means 0.5 less than 0 0.5 means 0.5 more than 0

–0.3 means 0.3 less than 0 0.3 means 0.3 more than 0

–0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 0.2 0.3 0.4 0.5

19
Rational Numbers

01 TB Math F1.indd 19 10/20/16 11:55 AM