Number Types, Sets, Notation, Rounding and Vocab Flashcards
What is a Real Number?
All numbers
What is a Rational Number?
Numbers that can be made by dividing two integers (i.e can be written as p/q)
What is an Irrational Number?
A real number that cannot be made by dividing two integers (i.e cannot be written as p/q)
What is an Integer?
A whole number (positive or negative) that can be written without a fractional component
What is a Whole Number?
A positive number starting from zero
What is a Natural Number?
Counting numbers (whole numbers without zero)
What does the number notation “N” refer to?
Natural Numbers
What does the number notation “W” refer to?
Whole Numbers
What does the number notation “I” or “Z” refer to?
Integers
What does the number notation “Q” refer to?
Rational Numbers
What does the number notation “Q bar” refer to?
Irrational Numbers
What does the number notation “R” refer to?
Real Numbers
What is a Multiple?
The result of multiplying a number by an integer
What is a Lowest Common Factor?
The smallest whole number which is a multiple of two numbers
What is a Factor?
Numbers we can multiply together to get another number
What is a Highest Common Factor?
The highest number that can be divided exactly into each of two or more numbers
What is an Exponent?
Exponent of a number says how many times to use that number in a multiplication
What is a Power?
Exponent of a number says how many times to use that number in a multiplication
What is an Index?
Exponent of a number says how many times to use that number in a multiplication
What is an Absolute Value?
How far away a number is from zero
What is a Composite Number?
A whole number that can be made by multiplying other whole numbers
What is Expanded Form?
The expanded form of a number writes it as a sum, with each digit makes an individual term.
What is a Quotient?
The answer after we divide one number by another, dividend / divisor = quotient
What is a Product?
The answer when two or more values are multiplied together
What is a Sum?
The answer when two or more values are added together
What is a Prime Number?
A whole number greater than 1 that can not be made by multiplying other whole numbers (the reverse of composite numbers)
What is a Reciprocal?
The reciprocal of a number is of a number is 1 divided by the number (i.e. reverse the fraction)
Round 247.58 to 1 significant figure
200
Round 372.99 to 2 significant figures
370
Round 0.0219 to 2 significant figures
0.022
Round 5239 to 3 significant figures
5240
Write 12,534 in Standard Form
1.2534 × 10⁴
Write 0.24 in Standard Form
2.4 × 10^(−1)
What is an order of magnitude?
The power of ten required when writing a number in standard form
