8th grade math

Fractions

100

Simply the fraction 36/48

3/4

200

What is 3/8 + 5/12

29/24

300

What is 2/3 x 5/6

5/9

400

Convert 13/5 into a mixed number

2 3/5

500

What is (2/3 + 1/2) × (1/4 + 1/5)

63/120 which simplifies to 21/40

Algebra

100

Solve for x: 3x + 5 = 20

x = 5

200

Simplify: 4(2x + 3)

8x + 12

300

Solve: 2x − 7 = 13

x = 10

400

5x + 2x − 4 + 7

7x + 3

500

3x − 4 = -2x + 6

x = 2

Ratios and Proportions

100

Simly the ratio 24:36

2:3

200

If 6 pens cost $4.50, what is the unit price per pen. 

$0.75

300

Solve for x in the proportion 4/5 = x/10

x = 8

400

A model car is built with a scale of 1:25. If the actual car is 10 feet long, how long is the model?

2/5 feet or 0.4 feet or 4.8 inches

500

What is 30% of 240?

72

Integers

100

What is -5 + 8?

3

200

What is -12 − (-7)

-5

300

What is -6 x 4?

-24

400

What is -2 x (6 − 3) =

-6

500

What is 5 − 9 + (4 × -3) +7

-9

Geometry

100

What is the sum of the angles in a triangle?

180 degrees

200

Find the area of a triangle with a base of 10 cm and a height of 6 cm. 

30 cm squared

300

What is the circumference of a circle with a radius of 7 cm?

14*pi or 43.96

400

In a right triangle, if the shorter sides are 6 cm and 8 cm, what is the length of the hypotenuse? 

10 cm

500

Calculate the volume of a rectangular prism with length 5 cm, width 4 cm, and height 3 cm. 

60 cm cubed