Vocabulary
What is the definition of an even number?
Any number with a last digit of 0, 2, 4, 6 or 8
_____ groups of _____
(Ms. Li will tell you if it's right :D)
True or false: 2 is a prime number.
True
What does LCM stand for?
Lowest Common Multiple
Finish the sentence:
Multiples of 10 always end in _____ ?
Zero
In this equation, which numbers are the factors?
3 X 5 = 15
Factors are two numbers that are multiplied together.
3 and 5 are factors are 15.
Draw an array for the equation below:
4 x 5 = 20
(Ms. Li will decide if you are correct or not)
True or false: All even numbers are composite.
True
What is a multiple?
Multiples are the products (answers) of a given number.
Name 5 multiples of 10
Answers will vary.
What is the definition of a Prime number?
Give an example.
A prime number is a number with only two factors, 1 and itself.
(Examples will vary)
How are these equations the same? And how are they different?
3 x 2
2 x 3
They both equal 6 but their arrays are different.
3 x 2 is 3 groups of 2
2 x 3 is 2 groups of 3
What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
LCM is 24
What is 8 x 10,000?
80,000
What is the definition of a composite number?
Give an example.
A composite number is a number with more than two different factors.
(examples will vary)
Solve the problem below:
Tommy has 5 boxes of comic books. Each box has 50 comics in it. How many comic books does Tommy have in total?
5 x 50 = 250
Tommy has 250 comic books in total.
What is the prime factorization of 32?
2 x 2 x 2 x 2 x 2
Find the LCM for 12 and 5
LCM is 60
What is 15 x 100,000
1,500,000
What is the definition of prime factorization?
It is when you find all the prime factors that multiply together to get a number.
Solve the problem:
There are 28 students in a class. There are 5 classes. How many students are there?
There are 140 students.
5 x 2 x 3 x 2
Find the GFC between 56 and 48
GFC is
What is the trick to use when multiplying a number by a multiple of 10?
Just add the number of zeros in the multiple of 10 to the end of the product. Multiple the remaining digits together and that goes in front of the zeros.