Vocabulary
A letter or symbol that represents an unknown amount.
variable
What does "a number plus four" look like?
n + 4
5 x 4 + (8 -1)
27
n + 6, n= 10
16
5 ( 10 + 8) =
90
What is an algebraic expression?
An expression that involves variables, numbers, and operations.
Write: "20 minus a number"
20 - n
6 X 3 - 8 + 4 X 3
22
9 + n, n = 20
29
2 ( 9 + 8)
34
5 (8 + 4). What property can you use to solve this?
Distributive Property
"4 times a number". Give two ways it can be written.
(4)(n) or 4n
15 - 2n, n= 3
9
15 (10 + 5)
225
gap between axons and dendrites
synapse
Write: "a number divided by 5"
n/5
5n-6, n=6
24
How can you write the following using distributive property? 5 x 209?
5(200+9)
takes information AWAY from the cell body
axons
Write 5k + 9 in words.
five times a number plus 9
( 9 x 5) + 8 x 5 - 4
81
15 (n + 1) + 6, n = 9
156
20 ( 5 + 3 + 10)
360