8th grade Review

Unit 1

100

write 54200000 in standard form

5.42 x 10⁷

200

Write 0.0000405 in standard form

4.05 x 10⁵

300

express 1/32 as indice

2^-5

400

6.5 x 10⁵ + 5.6 x 10⁵

1.21 x 10⁶

500

a = b⁰ - b² - b⁴

What is the value of "a" when "b" is 2

-19

Unit 2-3

100

what is 2(x-1) + (x+2) when x is 3

9

200

expand the brackets (x+2)(x+5)

x²+7x+10

300

write down 5 most commonly spoken language in the world 

english, Mandarin, Hindu, Spanish, French

400

a triangle has base of (x-1) and height of (x+1), what is the area of the triangle, write your answer as simply as possible

(x²-1)/2

500

 m = (a-2b)/5 make the b subject

(5m-a)/-2 = b

Unit 4-5

100

what is Pythagoras Theorem

a²+b²=c²

200

Guess a number between 1-30

22 

300

x+2y=6

2x+y=24

x =14

y = -4

Need both answers to receive point

400

63<9x<54 solve the inequality

7<x<6

500

What is the sum of internal angles of a regular 5 pointed star?

1440

Unit 6-7

100

write down formula for area of circle and circumference

pi x Radius², 2 x Pi x Radius or diameter x Pi

200

Guess the Brand

🚫🔑

Nokia

300

how many kilograms in 960 tons

960000kg

400

Mr Kim ate 4 pieces of pizza that was evenly cut into 8 pieces. The diameter of the pizza was 30cm. what is the area of the pizza that Mr. Kim ate

112.5π(pi) cm²

500

How many milimeters in 56 micrometers

5.6 x 10^-2