GCF, Simplifying Fractions, & LCM Review

Estimating Sums & Differences

100

4/5 + 1/8

1 + 0 = 1

200

4/6 - 6/10

1/2 - 1/2 = 0

300

12/16 + 3/5

1 + 1/2 = 1 1/2

400

12/15 - 2/12

1 - 0 = 1

500

27/40 - 13/25

1/2 - 1/2 = 0

GCF

100

4 and 8

GCF = 4

200

12 and 16

GCF = 4

300

24 and 40

GCF = 8

400

50 and 35

GCF = 5

500

18 and 72

GCF = 18

Simplifying Fractions

100

Simplify:  12/24

1/2

200

Simplify: 10/12

5/6

300

Simplify: 28/49

4/7

400

Simplify:  16/36

4/9

500

Simplify:  34/51

2/3

LCM

100

2 and 5

LCM = 10

200

3 and 6

LCM = 6

300

6 and 10

LCM = 30

400

12 and 9

LCM = 36

500

3, 5, and 9 

LCM = 45