Arrays
Equal Groups
Word Problems
Bar Diagrams
Unknown Numbers!
100
Write a multiplication equation for this array:
5 x 7 = 35
100
Write a multiplication equation for these equal groups:
2 x 3 = 6
100
Ms. Edwards has 24 students in her class. If she divided her class into 4 equal groups, how many students would be in each group? Make a bar model to represent.
6 students in each group.
100
Draw a bar model for this division problem:
36 
4= ___
4 boxes, 9 in each box, 36 total.
100
Find s:
16 ÷ 4= s
s= 4
200
Write a division equation for this array:
15 ÷ 5= 3
200
Write a multiplication equation for these equal groups:
4 x 5 = 20
200
Ms. Berntson has 30 chairs in her room. If she arranges them into 6 equal rows. How many chairs does she have in each row? Which 2 are correct?
a) 6x6= 30
b) 6 x s =30
c) 30 x 6 = s
d) 30 ÷ s = 6
b and d
200
Draw a bar model for this division problem:
42 6
check bar model
200
Solve for n:
n ÷ 7= 3
n =21
300
Write a multiplication equation for this array:
2 x 6 = 12
300
Write a multiplication equation for these equal groups:
3 x 2 = 6
300
Mrs. Denney read 3 books each week for 3 weeks. She then read 1 books each week for the next 5 weeks. How many books did Mrs. Denney read?
3 x 5 = 15, 1 x 5 = 5
15 + 5 = 20
300
Draw a bar diagram for this division problem:
27 ÷ 3 = _
Check bar model
300
Solve for x:
14 ÷ x = 7
x= 2
400
Write a division equation for each of these arrays:
15 ÷ 3 = 5 and 15 ÷ 5 = 3
400
Write a multiplication equation for these groups:
3 x 6 = 18
400
Ms. Ali has 20 cookies. She puts an equal number of cookies in each of 4 cookie jars. Then, Dee Dee adds 5 more cookies-one in each jar. How many cookies did Ms. Ali put in the jars? THEN, how many cookies were in the jar after Dee Dee put one more in each jar?
Ali= 20 ÷ 4 = 5
Dee Dee= 5+1= 6 in each jar
400
Write a division equation for this bar diagram:
24 ÷ 3 = 8
400
Solve for t:
t= 45 ÷ 9
t= 5
500
Which property is shown here in these arrays:
The commutative property
500
Write a multiplication equation for these groups:
You can't because they're not equal groups!
500
Ms. Edwards and Mrs. Wetzbarger are trying to figure out which number could be placed in each box to make this equation true.
2= __ ÷ 10
Ms. Edwards says 20. Mrs. Wetzbarger says 5.
Who is correct? Explain your reasoning.
Ms. Edwards is correct, because there are 10 groups with 2 in each group to make 20.
Mrs. Wetzbarger cannot divide 5 into 10 groups.
500
Write a division equation for this bar diagram:
20 ÷ 5 = 4
500
solve for y:
7= 56 ÷ y
y = 8