Flashcards
Identity property
a + 0 = a
a x 1 = a
Roman numerals
I = 1 L = 50
V = 5 C = 100
X = 10 D = 500
M = 1,000
Commutative property
a + b = b + a
a x b = b x a
Rules for writing and saying numbers with words
Don’t say “and” unless you mean the decimal point.
Commas go exactly where they do when you write digits.
All hyphenated numbers are between 21 and 99.
Digits
0 1 2 3 4 5 6 7 8 9
What is the place value system?
The position (place) of a number determines its value.
Counting numbers
123456…
Whole numbers
0123456…
Parts of an addition problem
Addend, addend, sum
Parts of a subtraction problem
Minuend, subtrahend, difference
Parts of a multiplication problem
Multiplicand, multiplyer, product
Or
Factor, factor, product
Parts of a division problem
Dividend, divisor, quotient
Sample
The people asked survey questions.
Population
The group that the sample comes from.
Associative law
(a + b) + c = a + (b + c)
a x b) x c = a x (b x c
Obtuse, right, acute angles
Obtuse- greater than 90 degrees
Right- angle measuring 90 degrees
Acute- less than 90 degrees
Triangle types: scalene, isosceles, equilateral
Scalene- triangle with 3 sides of different lengths
Isosceles- triangle with 2 sides the same length
Equilateral- triangle with 3 sides the same length
Triangle types: acute, right, obtuse
Acute triangle- all angles are acute
Right triangle- one angle is a right angle
Obtuse triangle- one angle is obtuse
Polygon
A shape with straight sides that is closed
Polygons
Triangle- 3 sides Quadrilateral- 4 Pentagon- 5 Hexagon- 6 Octagon- 8
Area of a rectangle
Area of a rectangle equals length times width
Parts of a fraction
Numerator, denominator
Dividing by 1
Any number divided by 1 is itself.
Dividing by itself
Any number divided by itself equals 1
Dividing 0
0 divided by any number equals 0
Diving by 0
YOU CAN’T DO IT!!!!!!!
