An ABC book of grade 9 math

1. ABC Math Book
By Kyla Duncan

2. A is for Algebra
• What is algebra?
• Algebra is math that uses letters like ‘x‘ and ‘y‘ in place of unknown numbers.
• For example; 6 + 2 – x = 6, ‘x‘ is unknown and is often referred to as the variable.
• We learned about algebra is our unit on polynomials
• A polynomial is an expression that can have variables, constants, and/or exponents

3. B is for BEDMAS
• BEDMAS stands for; Brackets Exponents Division Multiply Add Subtract
• This is the order in which we complete equations
• We learned about BEDMAS in our first unit, Rational Numbers
• AKA, BEDMAS is the order of operations

4. C is for Coefficient
• A coefficient is a number, or other known factor, that is placed (usually) in
front of another quantity – for example -3x (- being the coefficient)
• A coefficient cam be negative or positive, it can also be 1
• It is outside the base number
• We first learned about coefficients in our unit on exponents

5. D is for Distributive Property
• The Distributive Law states that multiplying a number by a group of factors
added together is the same as multiplying them separately

6. E is for Exponents
• The exponent of a number tells us how many times to multiply that number
by itself

7. F is for Fraction
• A fraction is part of a whole
• The bottom number (denominator) states how many parts the whole is divided into
• The top number (numerator) states how much there is

8. G is for Greater Than
• In essence, bigger
• The symbol > means greater than

9. H is for Height
• The height is the vertical distance from top to bottom
• We learned about this in symmetry and surface area

10. I is for Independent Variable
• An independent variable is an “input” fraction
• It is the variable you have control over

11. J is for Just do it
• “Just do it” refers to multiplying fractions. Just do it straight across, not that
complicated.

12. K is for ________ Enlargement
• Simply put, to make larger

13. L is for Like Terms
• Like terms are terms that have identical variables

14. M is for Major Arc
• The major arc is the larger arc that joins two points on the circumference of
a circle

15. N is for Negative
• There are negative and positive numbers
• Negative numbers are numbers less than zero

16. O is for Oblique Lines
• Oblique lines are slanted, rather than up and down or left and right

17. P is for Pythagorean Theorem
• Pythagorean theorem states that in a right triangle;

18. Q is for Quadrant (circle)
• A quadrant is a quarter of a circle

19. R is for Rational Numbers
• A rational number is any number that can be made by dividing one integer by
another

20. S is for Symmetry
• Symmetry is one shape becomes identical to another if you flip or turn it.

21. T is for Table of Values
• A table of values is a list of numbers that are used to substitute one variable

22. U is for Using the Scale, you can find the Scale
Factor
• If you know the scale, than you can easily find the scale factor and vice versa

23. V is for Variable
• A variable is usually a letter that represents an unknown number

24. W is for With Reduction, it has to be less than
one but more than zero
• To reduce is to make smaller.
• Things get complicated when you get into negatives

25. X is for X-Axis
• The X-Axis is the line on a graph that runs horizontally (left-right) through
zero.

26. Y is for Y-Axis
• The Y-Axis is the line on a graph that runs vertically (up-down) through
zero.

27. Z is for Zero Pairs
• Zero pairs are when you subtract a number by itself