Math

Multiply

100

-10 times -5

50

200

y = x^2, when x = 12

144

300

If x² = 36, x can be what two numbers?

6 & -6

400

Simplify: (6x²y)(-2xyz) 

-12x³y²z

500

Expand: 3x(2x - 4)

6x² - 12x

Divide

100

-25 divided by 5

-5

200

144 divided by -8

-18

300

1/3 divided by 1/2

2/3

400

Simplify:   6x²y

              -2xyz

- 3x 

   z

500

Factor:  (12x² + 4x)

4x(3x + 1)

Property of Equality

100

x + 5 = 12

7

200

x - 2.30 = 5.70

8.00

300

12x = 8.4

0.7

400

two-thirds times x = three-fourths

x = nine-eighths

500

1.55 = x - 2.35

3.9

Circumference

100

What are the two equations of a circumference of a circle?

pi(diameter) & 2piR

200

What are the two approximations most commonly used for Pi?

3.14 & 22/7

300

What is the circumference of a circle with a radius of 14 in? 

88 in

400

What is the circumference of a circle with a diameter of 5 m?

15.7 m

500

What is the ratio of two circles' circumferences if one has a diameter of 8 cm and the other is 12 cm?

2/3

Area of a Circle

100

What is the equation used to find the area of a circle?

A = Pi(radius)²

200

Four students sit at a circle table. The table has a diameter of 6 feet. About how many square feet does each student get to work?

About 7 sq ft

300

What is the area of a circle that has a radius of 7 ft?

about 154 ft²

400

What is the area of a semicircle if the diameter is 16 cm? in terms of Pi

32 Pi cm²

500

What effect does doubling the diameter of a circle have on the area of the circle?

Four times as large