ABC Math Book

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 t he line on a graph that runs horizontally (left-right) through zero.

26. Y is for Y-Axis The Y-Axis is t he 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