Dividing Fractions

There are 3 Simple Steps to Divide Fractions: Turn the second fraction (the one you want to divide by) upside down (this is now a reciprocal). Multiply the first fraction by that reciprocal of second fraction Simplify the fraction (if needed) Fractions and Whole Numbers What about division with fractions and whole numbers? Make the

Positive and Negative Numbers

Numbers Can be Positive or Negative – Negative sign + Positive sign No Sign Means Positive If a number has no sign it usually means that it is a positive number. Any numbers greater than zero are described as positive numbers. Usually, we don’t put a plus sign in front of positive numbers because the

Irrational Numbers

Irrational means not Rational An Irrational Number is a real number that cannot be written as a simple fraction.   Example Rational Number 0.5 = ½ Irrational Number √2 = 1.414213562373095… = ?/? Rational Numbers A Rational Number can be written as a Ratio of 2 integers (ie a simple fraction). Irrational Numbers The numbers that

Geometric Sequences and Sums

Sequence A Sequence is a set of things (usually numbers) that are in order. 2, 4, 6, 8, … Geometric Sequences In a Geometric Sequence, each term is found by multiplying the previous term by a constant. This sequence has a factor of 3 between each number. Each term (except the first term) is found

Parallel and Perpendicular Lines

Definition of Parallel Lines If 2 lines are parallel, their slopes are same. Slope is the value m in the equation of a line. y = mx + b If two lines are parallel lines, they will never intersect. They have exactly the same steepness which means their slopes are identical. Since: Slope is a

Trigonometric Identities

Right Triangle The Trigonometric Identities are equations that are true for Right Angled Triangles. Each side of a right triangle has a name: Adjacent is always next to the angle Opposite is opposite the angle Sine, Cosine and Tangent 3 main functions in trigonometry are Sine, Cosine and Tangent. They are just the length of one

Least Common Denominator

What is a Denominator? The denominator is the bottom number in a fraction. It shows how many equal parts the item is divided into Common Denominator? When the denominators of 2 or more fractions are the same, they have Common Denominators. Finding a Common Denominator One simple answer is to multiply the current denominators together.

Quartiles

Definition of Quartiles What are Quartiles? In statistics, Quartiles are values that divide your data into quarters. They aren’t shaped like pizza slices. Quartiles divide your data into 4 segments according to where the numbers fall on the number line. The 4 quarters that divide a data set into quartiles are: Lowest 25% of numbers. Next lowest

Mean

Mean is the average of the numbers. How to Find the Mean It is easy to calculate: add up all the numbers divide by how many numbers there are In other words it is the sum divided by the count Mean For Negative Numbers How to handle negative numbers? Adding a negative number is the

Arithmetic Sequences and Series Sums

Sequence A Sequence is a set of things (usually numbers) that are in order. 1, 3, 5, 7, … Each number in the sequence is called a term (or sometimes “element” or “member”). Arithmetic Sequence In an Arithmetic Sequence, the difference between one term and the next is called a constant. In other words, we