Vocabulary
LCM stands for?
Least Common Multiple.
A bakery sells packs of cupcakes in 6 and packs of cookies in 4. If James wants to buy the same amount of cupcakes and cookies, what is the least amount he can buy of both?
The LCM of 6 and 4 is 12. James needs to buy 12 cupcakes and 12 cookies to have the same amount.
Find the LCM of 5 and 10.
The LCM of 5 and 10 is 10.
What are the first 4 multiples of 4?
4, 8, 12, and 16.
What does PEMDAS stand for?
Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.
Least Common Multiple Definition
The smallest positive number that is a multiple of two or more given numbers.
Sarah practices piano every 3 days, and Mark practices every 5 days. If they both practice today, how many days will it be until they both practice on the same day again?
The LCM of 3 and 5 is 15. They will practice on the same day again in 15 days.
Find the LCM of 3 and 7.
The LCM of 3 and 7 is 21.
What are the first 5 multiples of 7?
7, 14, 21, 28, 35.
What is the formula to solve the area of a triangle?
Area (A) = 1/2 bh
Common Multiple Definition
A number that is a multiple of two or more given numbers.
A store is selling hot dogs in packs of 7 and buns in packs of 9. What is the smallest number of hot dogs and buns a customer must have to buy an equal number of each?
The LCM of 7 and 9 is 63. The customer must buy 63 hot dogs and 63 buns.
Find the LCM of 6 and 8.
The LCM of 6 and 8 is 24.
What are the first 3 multiples of 15?
15, 30, 45.
What are the first four prime numbers?
2, 3, 5, and 7.
Multiple Definition
The result of multiplying a number by another number.
An airline stewardess flies to Paris every 10 days for one day. Another stewardess flies to Paris every 15 days for one day. Today, both are in Paris. After how many days will both stewardesses be in Paris again on the same day?
The LCM of 10 and 15 is 30. After 30 days both stewardesses will be in Paris again on the same day.
Find the LCM of 15 and 30.
The LCM of 15 and 30 is 30.
What are the first 9 multiples of 11?
11, 22, 33, 44, 55, 66, 77, 88, 99.
What is the ONLY even prime number?
The only even prime number is 2.
Define BOTH:
Prime Numbers
Composite Numbers
Prime numbers are numbers with only two factors: 1 and itself.
Composite numbers have more than two factors.
A subway arrives every 12 minutes and a bus arrives every 18 minutes. If both arrive at 8:00 AM, when will they arrive again at the same time?
LCM(12, 18) = 36
They will both arrive again at 8:36 AM.
Find the LCM of 12, 24, and 32.
The LCM of 12, 24, 32 is 96.
What are the first 5 multiples of 16?
16, 32, 48, 64, 80.
What are the correct units for each measurement?:
Area is measured in units_____?
Volume is measured in units_____?
Surface Area is measured in units___?
Area = Units Squared
Volume = Units Cubed
Surface Area = Units Squared