Number Sense Unit Review

GCF

100

GCF of 10 and 12

GCF=2

200

GCF of 12 and 16

GCF=4

300

GCF of 16 and 24

GCF=8

400

GCF of 20 and 28

GCF=4

500

GCF of 32 and 48

GCF=16

LCM

100

LCM of 8 and 10

LCM=40

200

LCM of 8 and 6

LCM=24

300

LCM of 5 and 9

LCM=45

400

LCM of 12 and 16

LCM=48

500

LCM of 28 and 24

LCM=168

Scientific Notation

100

Write this number in Scientific Notation: 23,000

2.3 x 10^4

200

Write this number in Scientific Notation: .00007081

7.081 x 10^-5

300

Write this number in Scientific Notation: 1,380,000

1.38 x 10^6

400

Write this number in Scientific Notation: .0000000308217

3.08217 x 10^-8

500

Write this number in Scientific Notation: 4,231,820,000,000

4.23182 x 10^12

Powers

100

Express 49 as a power 

7²

200

Write the Following as a Power: 

6 x 6 x 6 x 6 x 6 x 6 x 6

6⁷

300

Write the following power as repeated multiplication: 

8⁴

8 x 8 x 8 x 8

400

Solve the following power: 

-2⁴

-2 x -2 x -2 x -2 = 16 

*two negatives make a positive*

(-2 x -2 = 4)

500

If you win $2 on March 1, $4 on March 2, and $8 on March 3. How much will you win on March 5?

2⁵ = 2 x 2 x 2 x 2 x 2 = $32

Square Roots/Estimates

100

Calculate the Following: 

√81

√81 = 9 

200

Calculate the Following: 

√144 =

√144 = 12

300

Order these from least to greatest: 

√400, √100, 19, 15, 4²

√100 (10), 15, 4² (16), 19, √200 (20)

400

Estimate the square root of the following and show the upper and lower squares: 

√14

√14 ~ 3.4, 3.5, 3.6

Lower = √9 

Upper √16 

500

Estimate the square root of the following and provide the upper and lower squares: 

√56 

√56 ~ 7.5 

Lower = √49 

Upper = √64