Negative Numbers, Scientific Notation, and Square Roots.
Frames 5-1 through 5-33.
After completing this lesson, you should be able to:
Add, subtract, multiply, and divide using negative
Change numbers to and from scientific notation.
Multiply and divide using scientific notation.
Estimate square roots.
Identify the terms "absolute value," "square," and "square root."
Work the following exercises (numbered frames) in numerical order. Write
the answer in the space provided in the frame. After you have completed a
frame, check your answer against solution given in the shaded area of the
following frame. The final frame contains review exercises for Lesson 5.
These exercises will help you to achieve the lesson objectives.
NEGATIVE NUMBERS. In the previous lesson, one of your answers
involved a temperature below zero. The answer was given as a negative
number. Sometimes it is easier to understand negative values if you use
a device such as the number line represented below. Positive numbers
are to the right of the zero; negative numbers are to the left of the zero.
(Zero is usually classified as a "non-negative" number.) Both ends of the
number line extends to infinity (without end). All whole numbers,
fractions, decimals, and mixed numbers are represented on the number
line. Negative number are denoted by a negative or minus sign () before
the number. Positive numbers are denoted by a positive or plus sign (+)
before the number or by having no sign before the number.
On a number line, ___________________ numbers are usually to the left
of zero while positive numbers are to the _________ of zero.