Understand Factors
Draw arrays to find all the factors of 26.
What is:
1, 2, 13, 26.
Find the factor pairs for 45.
What is 1, 3, 5, 9, 15, 45.
A valet has 34 cars to park in a rectangular array.
What are the different ways the valet could park the cars?
1 row of 34; 34 rows of 1 car; 2 rows of 17 cars; 17 rows of 2 cars.
Is 49 prime or composite?
What is Composite.
49: 1, 7, 7, 49
Find five multiples of 3.
What is 3, 6, 9, 12, 15.
Draw arrays to find all the factors of 9.
What is 1, 3, 9.
Find the factor pairs of 40.
What is 1, 2, 4, 5, 8, 10, 20, 40.
How do you know when you can stop looking for factors of a number?
When the factor pairs begin to repeat.
Is 13 prime or composite?
What is Prime.
Prime: 1, 13
Find five multiples of 6.
What is 6, 12, 18, 24, 30.
Draw arrays to find all the factors of 37.
What is 1, 37.
Find the factor pairs of 56.
What is 1, 2, 4, 7, 8, 14, 28, 56.
Ms. Maribel wants to arrange the 20 desks in her classroom into rows with the same number of desks in each row. She wants at least 2, but not more than 8 rows.
What are the factor pairs for 20?
What is 1 and 20; 2 and 10; 4 and 5.
Is 25 prime or composite?
What is Composite.
25: 1, 5, 25
Find five multiples of 4.
What is 4, 8, 12, 16, 20.
Draw arrays to find all the factors of 24.
What is 1, 2, 3, 4, 6, 8, 12, 24.
Find the factor pairs of 63.
What is 1, 3, 7, 9, 21, 63.
Ms. Maribel wants to arrange the 20 desks in her classroom into rows with the same number of desks in each row. She wants at least 2, but not more than 8 rows.
Find the ways Ms. Maribel can arrange the desks.
She can make 2 rows with 20 desks in each row, 4 rows with 5 desks in each row, and 5 rows with 4 desks in each row.
Is 55 prime or composite?
What is Composite.
55: 1,5, 11, 55
Find five multiples of 9.
What is 9, 18, 27, 36, 45.
Draw arrays to find all the factors of 19.
What is 1, 9.
Find the factor pairs of 12.
What is 1, 2, 3, 4, 6, 12.
Kevin invited 15 friends to his birthday party. They played a game where everyone had to separate into groups. Each group had the same number of children. The game could not be okayed with all 16 children in one group and each group had to have more than 1 child.
List the factor pairs of 16 and then find the different ways Kevin and his friends could divide into groups.
What is 1 and 16, 2 and 8, 4 and 4;
They can form 2 groups of 8, 4 groups of 4, and 8 groups of 2.
Is 2 prime or composite?
What is Prime.
1: 1, 2
Tell whether the first number is a multiple of the second number. 22,2
What is 1, 2, 11, 22.