GCF/LCM
GCF of 12 and 18
6
Sarah has 12 red beads and 18 blue beads. She wants to make identical groups using all the beads. What is the greatest number of groups she can make?
6 groups
What is 3.4 + 2.5?
5.9
What is 8.5 − 3.2?
5.3
Which is greater: 4.7 or 4.07?
4.7
LCM of 4 and 6
12
Two bells ring at the same time. One rings every 6 minutes and the other rings every 8 minutes. After how many minutes will they ring together again?
24 minutes
What is 7.25 + 4.60?
11.85
What is 12.75 − 5.40?
7.35
Round 18.675 to the nearest tenth.
18.7
GCF of 24 and 36
12
A teacher has 24 pencils and 36 erasers. She wants to make identical supply bags using all the items. What is the largest number of bags she can make?
12 bags
What is 12.48 + 6.37?
18.85
What is 20.00 − 7.86?
12.14
A notebook costs $4.75 and a folder costs $2.89. How much do they cost altogether?
$7.64
GCF and LCM of 8 and 12
GCF = 4
LCM = 24
Two buses leave a station at the same time. One returns every 12 minutes and the other returns every 18 minutes. After how many minutes will they return together?
36 minutes
What is 25.675 + 8.49?
34.165
What is 45.625 − 18.79?
26.835
Miguel has $20.00. He spends $6.75 on lunch and $4.85 on a drink and snack. How much money does he receive as change?
$8.40
GCF and LCM of 18 and 30
GCF = 6
LCM = 90
A coach has 48 soccer balls and 60 cones. He wants to create identical equipment sets using all the items. What is the greatest number of identical sets he can make, and how many soccer balls and cones will be in each set?
12 sets
4 soccer balls and 5 cones per set
What is 143.806 + 27.459 + 6.735?
178.000
OR
178
What is 100 − 37.486?
62.514
A runner completes three distances: 2.75 miles, 3.625 miles, and 4.8 miles. How many miles does the runner complete altogether?
11.175 miles