Review for Test!

LCM/GCF

100

Rimas counts by 4s and Romana counts by 5s. What is the smallest number they will both say?

4s: 4, 8, 12, 16, 20

5s: 5, 10, 15, 20

LCM = 20

200

Find the GCF of 81 and 27.

GCF = 27

300

What would I need to divide these numbers by to get a simplified fraction? (Hint: What's their GCF?)
18/45

9! 

Simplified answer: 2/5

400

3/7 - 2/5 = ?

1/35

500

48 + 108 = 

a.) 12(3+10)

b.) 16(3 + 8)

c.) 12(4+9)

d.) 8(6 + 10)

c.) 12(4+9) = 156

Exponents

100

What is 3⁵?

243

200

(1/8)³ = ?

1/512

300

0.065 x 10⁴ =

650

400

What is 9.3 x 10⁰?

9.3 ;)

500

What is 1.4³?

2.744

Orders of Operation

100

12(2³ + 4) = 

144

200

[-45 + (-45) ] ÷ 45 = 

2

300

8(1.25) ÷ 5 - 2³

-6

400

Where would I put parenthesis so that

10 + 2³ - 5 x 2

will equal 26?

(10 + 2³ - 5) x 2

500

(2/3 + 1/5)² = 

169/225

Prime Factorization

100

Which of the following numbers is a PRIME number:

27, 33, 40, 43, 45, 48, 49, 77, 81

43

200

What is the answer to 2⁴ x 3?

48

300

What is 625 written as a repeated multiplication of 5s?

5 x 5 x 5 x 5 = 5⁴ = 625

400

What is the prime factorization of 72?

2³ x 3²

500

What is the prime factorization for the number 288?

2⁵ x 3²

Random Math :)

100

4000/500 = ?

(must be in simplest form!)

8

200

6.2 - 1.354 = ?

4.846

300

4/20 x 15/18 = ? 

(Answer must be in simplest form!)

1/6

400

43.6 divided by .04

1090

500

What is the distance between (4, -12) and (4, -18)?

6 units