# ACT Math – Pre-Algebra Review

The ACT Math – Pre-Algebra Review page focuses on the math concepts required to do well on the pre-algebra problems encountered in the ACT Math test. If a student answered incorrectly some of the questions in the Pre-Algebra Quiz, no need to worry. He/she will find on this page online resources to review or practice the topics he/she has trouble with.

Note: Go to the tools to check other review pages or quizzes.

#### Pre-Algebra Review Topics

##### Factors and Multiples

Math is fun – definitions and examples

Math Goodies– least common multiples

Math.com – factoring

##### Divisibility

Math Goodies – rules and examples

##### Remainders

Khan Academy – long divisions and remainders – video (2:41)

Math is fun – definition

##### Percentages

Math is Fun – introduction to percentages

Math is Fun – percent change

Helping with Math – percentages, percentage increase, percentage decrease – definitions and examples

Skills you need – percentage change

##### Fractions

Math is fun – adding fractions

Math is fun – subtracting fractions

Math is fun – multiplying fractions

Math is fun – dividing fractions

##### Decimals

Math is fun – lesson and exercises

##### Ratios

Math is fun – lesson

##### Proportions

Khan Academy – proportions with unknown variable

Math is fun – lesson and examples

purplemath.com – solving simple proportions

##### Mean, Median, and Mode

Math goodies – Mean, Median, Mode

##### Probability

Math is fun – lesson and examples

Maryville University – A student’s guide to probability and statistics

##### Absolute Value

Math is fun – lesson

##### Exponents

Math is fun – lesson and examples

##### Square Roots

Math is fun – lesson and examples

Purple Math – lesson and examples

##### Series

Math is fun – lesson and examples

Once the student has reviewed the skill he/she was struggling with, he/she should take the Pre-Algebra Quiz again to make sure he/she can answer all the questions correctly.

#### The CollegeGuide4Parents Math Tools

The ACT Math test focuses on concepts of pre-algebra, elementary algebra, intermediate algebra, coordinate geometry, plane geometry and trigonometry. CollegeGuide4Parents created 7 short interactive quizzes (see below for a complete list) designed to help students quickly identify the skills they need to review in each of these areas. When they are done answering a quiz, students are presented with a customized report which shows the mistakes made, the correct answers and the topics they need to work on.

Students are also directed to a review page (see below for a list of all the review pages) which shows a compilation of online resources they can consult to quickly study the concepts they have difficulties with. Review pages also include links to practice worksheets for those needing to spend extra time on some topics. Finally, the review pages also provide links to ACT problems which the students can work on once they are ready to practice.

##### Quizzes:

(order of operations; even and odd numbers; adding and subtracting signed numbers; multiplying and dividing signed numbers)

(factors and multiples; primes; divisibility; remainders; percentages; fractions; decimals; ratios; proportions; mean, median, and mode; probability; absolute values; exponents; square roots; series)

(substitution; polynomial simplification; linear equations; FOIL; inequalities)

(solving quadratic equations; systems of equations; functions; matrices; logarithms; and equations with variable on both sides)

(inequalities and graphs; distance between points; midpoint; coordinate plane; slope between 2 points; slope of perpendicular and parallel lines; slope-intercept form; intercept; graphs; vertex of parabola)

(lines and angles; acute, obtuse, complementary, and supplementary angles; vertical angles and parallel lines; special triangles; similar triangles; pythagorean theorem; perimeter and area of circles, triangles, and rectangles; volume of 3-dimensional shapes)

(fundamentals of trigonometry; Sine, Cosine, and Tangent; Sine, Cosine, Tangent and the right triangle; graphs of Sine, Cosine and Tangent functions; some more advanced concepts such amplitude, period, phase shift and frequency)

##### Review Pages:

(order of operations; even and odd numbers; adding and subtracting signed numbers; multiplying and dividing signed numbers)

(factors and multiples; primes; divisibility; remainders; percentages; fractions; decimals; ratios; proportions; mean, median, and mode; probability; absolute values; exponents; square roots; series)

(substitution; polynomial simplification; linear equations; FOIL; inequalities)

(solving quadratic equations; systems of equations; functions; matrices; logarithms; and equations with variable on both sides)

(inequalities and graphs; distance between points; midpoint; coordinate plane; slope between 2 points; slope of perpendicular and parallel lines; slope-intercept form; intercept; graphs; vertex of parabola)

(lines and angles; acute, obtuse, complementary, and supplementary angles; vertical angles and parallel lines; special triangles; similar triangles; pythagorean theorem; perimeter and area of circles, triangles, and rectangles; volume of 3-dimensional shapes)

(fundamentals of trigonometry; Sine, Cosine, and Tangent; Sine, Cosine, Tangent and the right triangle; graphs of Sine, Cosine and Tangent functions; some more advanced concepts such amplitude, period, phase shift and frequency)