Math Review For Mid Yr Exam

Question 1

Algebraic expression

Answer 1

Variables
No equal sign
#
Symbols

Question 2

Commutative properties

Answer 2

The order in which numbers are added or multiplied does not change the sun or product
9+6=6+9. 4•7=4•7

Question 3

Associative properties

Answer 3

The order in which numbers are grouped when added or multiplied does not change the some or product 
Parentheses usually 
(3+6)+1=3+(6+1) = 10
(5•9)•2=5•(9•2)= 90

Question 4

Additive identity

Answer 4

Zero doesn’t change the number identity

Question 5

Multiplicative identity

Answer 5

When any number is multiplied by one the product is the number

Question 6

Multiplicative property of zero

Answer 6

When any number is multiplied by zero the product is zero
12/6=2
6/12=.50

Question 7

Can be both

Answer 7

12+(x+18)
(12+18)+x
30+x

Question 8

Web doing inequalities
Don’t forget flip sign when negative top number doesn’t matter
When multiplying and dividing

Answer 8

The negative
3>y+10
-10. -10