Mastering Least Common Multiples in 5th Grade Math

What should you have ready before starting the mastery check?

• A textbook

• A computer

• Something to write with and something to write on

• A calculator

What is the least common multiple (LCM) of 4, 5, and 3?

• 25

• 20

• 15

• 12

Which of the following is the LCM of 8 and 6?

• 12

• 24

• 30

• 18

What is the LCM of 3 and 7?

• 21

• 14

• 24

• 18

If your list of multiples looks different from the example but you have the same LCM, is it correct?

• Only if the multiples are in the same order

• No, it must match exactly

• Yes, as long as the LCM is the same

• Only if the lists are the same length

What is the LCM of 15 and 10?

• 45

• 60

• 50

• 30

Why is it important to double-check the multiples when finding the LCM?

• To ensure you have the correct order

• To ensure you have the highest common multiple

• To ensure you have the least common multiple

• To ensure you have all the multiples

What is the LCM of 2, 9, and 3?

• 21

• 15

• 18

• 12

What should you do if you did not achieve 4 out of 5 correct answers?

• Try the mastery check again

• Give up

• Skip to the next topic

• Ask a friend for answers

What is the goal for the mastery check?

• 3 out of 5 correct

• 4 out of 5 correct

• 5 out of 5 correct

• 2 out of 5 correct