Arithmetic for Praxis II ParaPro Test Prep Study Guide (page 4)
The practice quiz for this study guide can be found at: This
section covers the basics of mathematical operations and their
sequence. It also reviews whole numbers, integers, fractions,
decimals, percents, and estimation. The Number Line The number
line is a graphical representation of the order of numbers. As
you move to the right, the value increases. As you move to the
left, the value decreases. A number line can show the
approximate values of certain numbers. For example, the
following number line shows that –4.5 is halfway between –5 and
–4 and that 2.2 is closer to 2 than it is to 3. The following
table will illustrate some comparison symbols: In addition, the
numbers being added are called addends. The result is called a
sum. The symbol for addition is called a plus sign. In the
following example, 4 and 5 are addends and 9 is the sum: - 4 + 5
= 9 In subtraction, the number being subtracted is called the
subtrahend. The number being subtrac