Course 2 Review! :)

Area of a Circle

100

Find the area of a circle if the radius is 7cm.

153.86 cm²

200

Find the area of a circle if the radius is 10cm.

314cm²

300

Find the area of a circle if the diameter is 8cm.

50.24cm²

400

Find the area of a circle if the diameter is 28cm.

615.44 cm²

500

Find the area of a circle if the radius is 12cm.

452.16 cm²

Adding Positive and Negative Numbers

100

(-8) - (+3) + (-2)

-13

200

(-3) + (-2) + (+7) + (-4)

-2

300

- (-2) - (+5) - (+6)

-9

400

(-3/5) - (-1/5) 

-2/5

500

(-0.2) - (+0.3)

-0.5

Multiplying Scientific Notation

100

(4.2 x 10⁶)(1.4 x 10³)

5.88 x 10⁹

200

(1.2 x 10-3)(4 x 10^-6)

4.8 x 10^-9

300

(1.2 x 10⁵)(3 x 10⁷)

3.6 x 10¹²

400

(4 x 10^-3)(2.1 x 10^-7)

8.4 x 10^-10

500

ab - (a - b) ...if a = 5/6 and b = 3/4

13/24

Missing Numbers

100

20w = 5.6

0.28

200

3/5w = 15

25

300

b - 1.6 = (0.4)²

1.76

400

2/3x = 8/9

4/3 or 1 1/3

500

5/8x = 40

64

Algebraic Terms

100

5a + 4a + 4ab

9a + 4ab

200

x² + 6x - 2x - 12

x² + 4x - 12

300

5xy - x + xy - 2x

6xy - 3x

400

2x + 3x² + 13x²

2x + 16x²

500

3a + 2a² - a + a²

3a² + 2a