Transcript Math Powerpoint for ACT Presentation

How to Tackle the
ACT in Math
Part 1 – The Target
Score
Math Scale Scores
Scale
Score
Raw Score
Scale
Score
Raw Score
Scale
Score
Raw Score
36
60
29
50-51
22
33-34
35
59
28
48-49
21
31-32
34
58
27
45-47
20
29-30
33
56-57
26
42-44
19
26-28
32
55
25
40-41
18
24-25
31
54
24
37-39
30
52-53
23
35-36
What Is Your Fit?
How to Use The Scale Score
Take your raw score and add 5
points.
2. Spend your time working on those
problems
* Note: Math test in order of
difficulty!
3. Pick your favorite column for the
rest of the questions (unless you
have extra time……..use that gift!!)
1.
Math Strategy
 #1
– Arbitrary Numbers
* Pick a number and plug in for
variable in possible answers
* The one that equals the
problem is the answer!
Example #1
 Which
of the following expressions
is equivalent to n3 – n2?
 A)
 B)
 C)
 D)
 E)
n2 (n + 1)
n (n – 1)
n2 (n – 1)
n
n (n2 – 1)
Let’s say we let n = 2….
 Which
of the following expressions
is equivalent to n3 – n2?
 A)
 B)
 C)
 D)
 E)
n2 (n + 1)
n (n – 1)
n2 (n – 1)
n
n (n2 – 1)
 Which
of the following expressions
is equivalent to 23 – 22? (This = 4)
 A)
 B)
 C)
 D)
 E)
n2 (n + 1)
n (n – 1)
n2 (n – 1)
n
n (n2 – 1)
 Which
of the following expressions
is equivalent to 23 – 22? (This = 4)
 A)
 B)
 C)
 D)
 E)
n2 (n + 1)  22 (2 + 1)  12
n (n – 1)  2 (2 – 1)  2
n2 (n – 1)  22 (2 – 1)  4 right!
n 2
n (n2 – 1)  2 (22 – 1)  6
#2 – Plugging In Answers
Plug
answers into problem
until correct answer is
achieved!
Example #2
A
high school basketball player has shot
170 free throws, making 100. Starting
now if she makes each free throw she
attempts, what is the least number of free
throws she must attempt to raise her
percentage to at least 70%?
 A) 19
B) 20
C) 63
D) 64
E) 70
A
high school basketball player has shot
170 free throws, making 100. Starting
now if she makes each free throw she
attempts, what is the least number of free
throws she must attempt to raise her
percentage to at least 70%?
 A) 19
B) 20
C) 63
119/189 = 63%
120/190 = 63%
163/233 = 70%
RIGHT!!
 D)
64
164/234 = 70%
E) 70
170/240 = 71%
#3 Coordinate Geometry
Pictures
can make life
easier if you forget
formulas under pressure!
Example #3
 Points
A (5,3) and P (-3,8) lie in
the standard (x , y) coordinate
plane. What is the slope of line
AP?
 A) -5/8
B) 5/8
C) -2/11
D) 2/11 E) 11/2
Is the slope pos or neg?
NEGATIVE, SO ELIMINATE B, D, AND E!
So is it A) -5/8 or C) -2/11?
COUNT IT OUT!!!
So remember…….
Easy
to hard in math….
Don’t try to work out all 60
problems!
Keep it simple….your math
teacher will never know!!