Operations Review (Lesson 7 - 11)

Prime Factors

100

Name the first five prime numbers.

2, 3, 5, 7, 11

200

What is a prime number?

A whole number divisible by only 1 and itself.

300

What is the prime factorization of 24?

24 = 2 x 2 x 2 x 3

400

What is the prime factorization of 42?

42 = 2 x 3 x 7

500

What is the prime factorization of 2310?

2310 = 2 x 3 x 5 x 7 x 11

GCF/LCM

100

What is the GCF of 10 and 4?

2

200

What is the LCM of 5 and 15?

15

300

What is the GCF of 88 and 40?

8

400

What is the LCM of 8, 12, and 10?

120

500

What is the GCF of 85, 51, and 68?

17

Multiplying/Dividing with Decimals

100

45.98 x 10 = ?

459.8

200

398.1 / 100 = ?

3.981

300

  2.56

x     4

______

= 10.24

400

816 / 0.4 = ?

2040

500

  987

x 5.6

_____

= 5527.2

Exponents

100

4² = ?

16

200

3³ = ?

27

300

5^x = 125

x = ?

x = 3

400

8² + 6² = ?

100

500

b³ = 343

b = 7

Ratios/Rates/Proportions

100

1:2 = 3:__

6

200

36:24 = __ : 2

3

300

If it takes $75 to fill up a 25 L tank of gas, what is the unit rate of gas? (cost per litre)

$3/L

400

The ratio of water to fire to grass type Pokemon is 2:4:3. How many water and grass types are there if are 16 fire type Pokemon?

8 water, 12 grass

500

Joey needs to order 5 boxes of doughnuts for every 15 diplomats. How many boxes of doughnuts will he need if he is in command of 90 diplomats.

30 boxes of doughnuts