7th Grade Math Review

Piece of Pi

100

What is the value of  pi (pi)

pi = 3.14

200

What would the circumference be of a circle with a diameter of 4?

approximately 12.56

300

What is the area of a circle with the radius 9 cm?

Close to 254.34 

cm^2

400

What is the area of a circle with a diameter of 13m?

132.665m2

500

What is the radius of a circle with an area of 140m²?

about 6.677m

600

What is the diameter of a circle that has an area of 3.14cm?

d = 2m

Algebraic Expressions

100

ix x+5 = 7 an algebraic equation or an algebraic expression?

It is an algebraic equation.

200

Solve for x:

x+17 = 29

x=12

300

solve for x:

3x-5=13

x=6

400

solve for x:

3x-7=5x+13

x = -10

500

Solve for x:

5x - 15 = 5x + 24

No Solution

600

2(x-4) +x+7 = 5 - 3(2 - x)

Infinite Solutions

Fun with Fractions

100

Write 0.15 as a fraction (Simplified)

3/20

200

Simplify:

6/22

3/11

300

Convert to a decimal:

3/8

0.375

400

Solve:

1/3 - 1/5

2 /15

500

7/10 + 1/5

9/10

600

3/4 div 1/8

6

Integers

100

-5² + 12

13

200

-5 - 3

-8

300

-14 - (-5)

-9

400

2(-5) + 7

-3

500

21-3(-2)²​​​​

9

600

-3(-4)²

48

Percent

100

What is 10 percent of 100?

10

200

What is 115% 225

258.75

300

Jake buys a pair of pants that are 25% off. The price of the pants before the sale was $75. How much did Jake save?

$18.75

400

75 is 50% of what number?

150

500

Susan bought a $200 television that was reduced in price by 35%. How much did she spend?

$130

600

Jason invested $350 and made 11.5% interest. How much does Jason have now?

$390.25