Fun Friday!

GCF

100

What is the GCF of 12 and 20?

4

200

What is the GCF of 15 and 25?

5

300

Brian has 35 Airheads and 28 Jolly Ranchers.  He wants to divide them equally so that each friend gets the same amount of Airheads and the same amount of Jolly Ranchers.  What is the greatest number of friends he can share with?

7

400

What is the GCF of 72 and 90?

18

500

Express 36 as a product of its prime numbers:

Hint: 8 = 2 x 2 x 2

2 x 2 x 3 x 3

LCM

100

What is the LCM of 8 and 2?

8

200

What is the LCM of 14 and 70?

140

300

Jakobi goes to football practice every 4 days and basketball practice every 6 days.  If Jakobi has football and basketball practice on the first day of the month, when will he have both sports on the same day again?

12th day

400

What is the LCM of 20 and 45?

180

500

Find the sum of these two fractions using LCM:

3/7 + 5/6 = 

1 and 11/42

Place Value

100

What place value is two units to the left of the "hundredths" place value?

tenths place

200

What place value is 10x less than the "ones" place?

tenths

300

What place value is 100x greater than the "10ths" place? 

tens

400

Round the number to the nearest hundredth:  78.347

78.35

500

Round the number to the nearest hundredth: 5.4967

5.50 or 5.5

Decimals

100

Find the sum: 13.4 + 9

22.4

200

Find the difference between 8.1 and 5.453

2.647

300

Find the product: 74.3 x 2.8

208.04

400

Find the quotient: 11,250 divided by 18

625

500

Find the quotient: 6.552 / .09

72.8

Fractions

100

What is the sum of these two fractions, in simplest form?  3/4 and 7/8

1 and 5/8

200

What is the difference between these two fractions:  4/5 and 1/3?

7/15

300

What is the product, in simplest form?  8/15 x 5/12

2/9

400

What is the quotient in simplest form?  5/6 divided by 1/3 

2.5 or 2 and 1/2

500

2 and 3/5 divided by 1 and 1/5 

2 and 1/6