Factors & Multiples
Name 2 factors of 36.
(1,2,3,4,6,9,12,18,36)
5x9= ?
45
There are 5 baskets with 6 apples each. How many apples total? Write the answer with an equation and a label.
5x6=30
30 apples
Is 9 prime or composite? Give one factor pair (if it is composite).
Composite
1x9, 3x3
Draw (or describe) an array for 3 × 4. How many total dots?
3 rows across, 4 rows down
4 rows across, 3 rows down
12 total dots
List all factor pairs of 48.
(1x48, 2x24, 3x16, 4x12, 6x8)
15x3= ?
45
A baker packs 72 muffins equally into 8 boxes. How many muffins per box? Write the equation and an answer with a label.
72/8=9
9 muffins
Is 2 prime or composite?
Prime
Use an array model to show 6 × 7 and give the product.
6 across, 7 down
7 down, 6 across
42 total dots
Is 1 a factor of every whole number?
Yes
144/12= ?
12
A class has 28 students. The teacher wants groups of 4. How many groups, and any students left over? Write the equation and answer with a label.
28/4=7
7 groups
Determine whether 27 is prime or composite. (Explain one way you know.)
Composite
It has more than one factor pair.
(1,3,9,27)
For the problem 6x8, how could I split up the 6 in my array.
Two groups of 3- (3x8 and 3x8)
How many factors does 100 have?
5: (1x100, 2x50, 4x25, 5x20, 10x10)
255/5= ?
51
A farmer has 120 eggs. He puts them into cartons of 12. How many full cartons? Write an equation and answer with a label.
120/12=10
10 full cartons
Is 1 prime or composite?
Tricked ya!
Neither!
The dimensions for a rectangle are the __________ of the total area.
Factors
List 2 multiples of 24.
48, 72, 96, etc
22x14= ?
308
Jenna bought 6 packs of stickers. Each pack has 6 stickers. She shares them equally among 4 friends. How many stickers does each friend get? Write the equation and answer with a label.
6x6/4=9
9 stickers
Tell me what makes a number prime and what makes a number composite and give me an example of each.
Prime numbers have only one factor pair. Composite numbers have more than one factor pair.
Prime: 2, 3, 5, 7, 11, etc
Composite: 4, 6, 8, 10, 12, etc
Give me a word problem that is realistic for an array. (Hint: you don't want large numbers)
Answers vary.