Numbers are placed in categories based on their properties. A natural number is greater than zero and has no decimal or fraction attached. These are also sometimes called counting numbers. {1, 2, 3, 4, ...}Whole numbers are natural numbers and the number zero. {0, 1, 2, 3, 4, ...}Integers include...
1. Types of Numbers TEAS 90
Numbers are placed in categories based on their properties. A natural number is greater than zero and has no decimal or fraction attached. These are also sometimes called counting numbers. {1, 2, 3, 4, ...}Whole numbers are natural numbers and the number zero. {0, 1, 2, 3, 4, ...}Integers include...
1. Types of Numbers
Numbers are placed in categories based on their properties. A natural number is greater than zero and has no decimal or fraction attached. These are also sometimes called counting numbers. {1, 2, 3, 4, ...}Whole numbers are natural numbers and the number zero. {0, 1, 2, 3, 4, ...}Integers include...
10. Comparison of Rational Numbers
Rational numbers can be ordered from least to greatest (or greatest to least) by placing them in the order in which they fall on a number line. When comparing a set of fractions, it is often easiest to convert each value to a common denominator. Then, it is only necessary...
9. Percentages
A percent (or percentage) means per hundred and is expressed with a percent symbol (%). For example, 54% means 54 out of every 100. A percent can be converted to a decimal by removing the % symbol and moving the decimal point two places to the left, while a decimal...
8. Proportions
A proportion is an equation which states that two ratios are equal. Proportions are given in the form a/b = c/d, where the a and d terms are the extremes and the b and c terms are the means. A proportion is solved using cross-multiplication to create an equation with...
7. Ratios
A ratio is a comparison of two numbers and can be represented as a/b(b ≠ 0), a:b, or a to b. The two numbers represent a constant relationship, not a specific value: for every a number of items in the first group, there will be b number of items in...
6. Rounding and Estimation
Rounding is a way of simplifying a complicated number. The result of rounding will be a less precise value that is easier to write or perform operations on. Rounding is performed to a specific place value, such as the thousands or tenths place. The rules for rounding are as follows:...
5. Decimals and Fractions
4. Order of Operations
When solving a multi-step equation, the order of operations must be used to get the correct answer. Generally speaking, the problem should be worked in the following order: 1) parentheses and brackets; 2) exponents and square roots; 3) multiplication and division; 4) addition and subtraction. The acronym PEMDAS can be...