8th Grade Math Year Review

Ch. 1 Princ. of Algebra

100

6 times the sum of 4 and y

6(4+y)

200

State the integers from least to greatest: 6, -3, -7, 0, 2

-7, -3, 0, 2, 6

300

Write an equivalent expression using the given property:  4(f+g); Distributive property

4f+4g

400

Find h:  h - 21 = -52

-31

500

Find t: t/23 = -9

-207

Ch 2 Rational Numbers

100

Simplify: 21/28

3/4

200

Write <, > or =.  

-16/9    -8/3

>

300

Subtract:

-1/17 - 13/17

-14/17

400

Multiply:

8 x 3/4

6

500

Add:

7/13 + 2/7

75/91

Ch. 3/Ch. 4

100

Is the ordered pair a solution of y=4x+3

(5,23)

Yes

200

Write in exponent form:

5x5x5x5x5x5x5

5⁷

300

Multiply. Write the product as one power.

10¹⁰ x 10⁷

10¹⁷

400

Write each number in standard notation.

9.2 x 10⁶

9,200,000

500

Write in scientific notation.

0.000057

5.7 x 10^-5

Ch. 5 Ratios, Proportions, and Similarity

100

Find two ratios that are equivalent to each given ratio.

6/9

2/3, 18/27

200

Ana's heart beats 225 times in 3 minutes.  How many times does her heart beat per minute?

75 times

300

Tell whether the ratios 5/6 and 15/21 are proportional.

90 is not equal to 105

400

A model of a 36 ft tall house was made using the seal 3in:2ft.  What is the height of the model?

h=54

500

Tell whether the scale reduces, enlarges, or preserves the size of an actual object.

10ft:120in

Preserves

Ch. 6 Percents

100

Write <,> or =.

3/4   70%

>

200

50% of 297 is about what number?

150

300

What percent of 180 is 30?

16.7%

400

Find percent increase or decrease to the nearest percent.

from 40 to 59

48% increase 

amount of increase 

original amount

500

Isaiah invested $3500 in mutual fund at a yearly rate of 6%.  He earned $945 in interest.  For how long was the money invested?

I = P x r x t

t = 4.5