Chapter 1 Flashcards
Natural Numbers
N = 0 1 2 3 4 5 …
Integers
Z = -3 -2 -1 0 1 2 3 …
negative numbers
Rational numbers
Q = 1 3 7
—- —- —-
5 10 1
0.2 0.3 7 fractions and decimals
Real numbers
Rational and irrational numbers
Irrational numbers
Numbers that cannot be expressed as a fraction
Prime numbers
Numbers whose factors are 1 and itself.
Note: one isn’t a prime number
Composite numbers
Numbers whose factors are more than one and itself.
Square numbers
A number multiplied by itself twice
Cube numbers
A number multiplied by itself thrice
Factors
Numbers who divide exactly into another number.
2 square
4
3 square
9
4 square
16
5 square
25
6 square
36
7 square
49
8 square
64
9 square
81
10 square
100
11 square
121
12 square
144
13 square
169
14 square
196
15 square
225
2 cube
8
3 cube
27
4 cube
64
5 cube
125
6 cube
216
7 cube
343
8 cube
512
9 cube
729
10 cube
1000
Prime factors
Numbers who are factors and prime numbers
Prime factorization method
Tree method and express them as a product of prime numbers.
a x a x b
Highest common factor
- Express each as a product of prime factors using the tree method
- Choose the common factors
- Multiply them all
Lowest common multiple
Use the box method and multiply the numbers outside the box.
