MATH COMP 2 Flashcards
1
Q
associative property of addition
A
(a+b) +c = a (b+c)
2
Q
commutative prop of addition
A
a+b = b + a
3
Q
additive property of 0
A
a + 0 = 0 + a = a
4
Q
existence of additive inverses
A
every a there is a -a
a + (-a) = (-a) + a = 0
5
Q
associative property of multiplication
A
(a x b) x c = a x (b x c)
6
Q
commutative property of multiplication
A
a x 1 = 1 x a = a
7
Q
existence of multiplicative inverses
A
for every a = 0 there is a 1/a so that a x 1/a x a = 1
8
Q
distributive property of multiplication over additions
A
a x (b + c) = a x b+ a x c
9
Q
if ab=c to get b a =lone next to the equal sign, divide both sides by a
A
b = c/a
10
Q
GCF
A
gcf of 20 and 50 is 10
prime factors of 50 are 2 and 5 as well as 20
11
Q
prime numbers
A
natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.
