HSPT Prep

HSPT Prep

Percent

• move the decimal back 2 times to convert % to decimal

• 0.12% is TINY!!! = 0.0012

Multiple Choice

Which of these is equivalent to 0.1%

• 0.1

• 0.111

• 0.001

• 0.001%

Multiple Choice

Which of these is equivalent to 1%

• 0.1

• 0.01

• 0.001

• 0.001%

Multiple Choice

Which of these is equivalent to 10%

• 0.1

• 0.01

• 0.001

• 0.001%

Multiple Choice

Which of these is equivalent to 0.15%

• 0.15

• 0.015

• 0.0015

• 0.0015%

Estimate

• when you see "approximately" or "about"

• change the given numbers to numbers that are close and easy to work with.  For example, change: 

   $3\ \frac{3}{4}\ to\ 4$  or 299 to 300.

Multiple Choice

You can finish about 

 $1\ \frac{3}{4}$  boxes in a day.  About how many boxes can you finish in 5 days?

• 10

• 6

• 20

• 1.75

Multiple Choice

You can finish about 

289 boxes in a day.  About how many boxes can you finish in 11 days?

• 10

• 20

• 30

• 60

Reciprocals

• must have a fraction

• Reciprocal of  $1\ \frac{1}{2}$  is  $\frac{2}{3}$  

Multiple Choice

Which are a pair of reciprocals?

• ( $4\ \frac{2}{3}$  ,  $\frac{3}{14}$  )

• ( $5\ \frac{1}{2}$  ,  $-5\ \frac{1}{2}$  )
  

• (3.4, 4.3)

• (7, 8)

Area of a triangle

•  $A=\frac{1}{2}\cdot b\cdot h$  
  

• Take half of the even number, then multiply by the last number

Multiple Choice

Find the area of a triangle with b=8 and h=9.

• 72

• 36

• 16

• 18

Area of a circle

•  $A=\pi\cdot r^2$  
  

• Square first, then deal with Pi

• If "approximately", use 3 for Pi

• If "exact", leave  $\pi$  

Multiple Choice

What is the approximate area of a circle with a radius of 4?

• 4

• 16

• 48

• 3 
  

Multiple Choice

What is the exact area of a circle with a radius of 4?

• 4 $\pi$  

• 16 $\pi$  

• 48 $\pi$  

• 3  $\pi$  
  

Percent increase

• 100% increase = double the given #

• 200% increase = triple the given #

• 300% increase = quadruple the given #

• Use process of elimination

Multiple Choice

40 increased by 150% is 

• 40

• 80 

• 100

• 120

Multiple Choice

40 increased by 250% is 

• 80

• 120 

• 140

• 160