tcap. some reminders carefully read each question read the entire question and all the answer...

TCAP

Some Reminders

Carefully read each question

Read the entire question and all the answer choices

Underline or circle key words….NOT

DO the work…

…draw pictures…write the problem

DON’T just do it on a calculator

DO all calculations twice (remember the calculator only does what you put in it!)

Positive – Negative Key

Negative Numbers

Press this key AFTER the number

Then CHECK display

Tricky ExpressionsEvaluate –(-ab)3 when a = -2 and b = -1

Insert values for varibles, then simplify a b -1 (-1 x (-2) x (-1))3

-1 ( 2 x (-1) )3

-1 (-2) 3

-1 x 8 -8

Follow order of operations

Percent Key

Percent Key

Only use this key to make a percent number a decimal to use for computation

Percent Key

This key DOES NOT change a decimal into a percent!!!!

Fraction Keys

Mixed Numbers

1 2/3

1 unit 2 / 3

Fractions

2/3

2 / 3

Fraction Keys - Simplify

Simplify and =

Reduce proper fractions like:

2/414/2825/1000

A b/c

Changes improper fractions to mixed numbers

12/415/1199/54

Lower extreme

Upperextreme

MedianLower

Quartile

UpperQuartil

e

10 20 30 40 50 60 70 80 90 100

25%25%25% 25%

Box and Whisker Plots

Interquartile Range (75-35=40)

Exponents

Square

22 = 4

122 = 144

32 = 9

Any exponent

53

Key:

5 yx 3 =

53 = 125

Know the difference!!

X2

X = -3

-3 x -3 = 9

-X2

The opposite of x2

X = -3

-3 x -3 = 9

opposite = -9

Square Roots

49Key49 then

Some numbers are not PERFECT SQUARE so the square root will not be a whole number

24 = 4.89

Area = 49each side is 77 x 7 = 49

Proportions

Look for words like:

RatioRate

Similar

15’ flagpole 28’ shadow

x tall tree__22” shadow=

15 x 22 = 28x 330 = 28x 330/28 = 28x/28

11.78 = x

Similar Triangles

Find corresponding sides to write

your proportionthen solve!!

x

5

12

15

=

15 x = 60 x = 4

Probability

Number of Favorable Outcomes

Number of Total Possible Outcomes

Relationships of valuesDirectly

Proportion

Y x y = Kx

linear

Inversely Proportional

xy = kand y = k/x

nonlinear

Function Check

Match type of relation with an equation.

Directly Proportional A. y = x2 + 3

Linear Equation B. y = x –1

Inversely Proportional C. 24 = xy

Nonlinear Equation D. y = -2x

Function CheckDirectly Proportional;

Inversely ProportionalLinear,

Non-linear

x y

2 12

3 18

4 24

x y

2 12

3 8

4 6

x y

2 5

3 6

4 7

x y

2 4

3 9

4 16

A B C D

Function Check

Match type of relation with an equation.

Directly Proportional; Inversely ProportionalLinear, Non-linear

A B C D

Not a straight line Straight line and passes through (0,0)

Straight line but doesn’t pass through (0,0)

Not a straight lineone value increases while the other decreases

YX

Just Remember

It’s not confusing!!

You know this.

Just make sense of the information given!