Multiplying Using
Equal Groups
Equal Groups
When multiplying using equal groups, what does the first factor of our multiplication equation tell us?
Number of Groups
Draw an array that represents the 7 X 5:
00000
00000
00000
00000
00000
00000
00000
Make a number line to show this equation:
4 x 3 =
Start your numberline at 0, make a jump of 3, then a jump to 6, then a jump to 9, and a final jump to 12
4 jumps with 3 steps in each
What multiplication strategy is being used?
6+6+6+6+6=
a) Equal Groups
b) Array
c) Skip Counting
d) Repeated Addition
D
What is a symbol for Multiplication?
X
Use equal groups to solve the multiplication equation
5 X 2 =
5 groups of 2 things in each group with a total of 10 things
What multiplication equation is: 4 rows of 5 strawberries?
4 X 5 = 20
Make a number line to show this equation:
6 x 3 =
Start your number line at 0, make a jump to 3, then a jump to 6, then to 9, then to 12, then to 15, and a final jump to 18.
That is 6 jumps of 3
Solve the following multiplication equation using repeated addition:
3 X 7=
7+7+7=21
What are the factors of this multiplication equation?
5 X 4 = 20
5 and 4
When multiplying using equal groups, what does the second factor of our multiplication equation tell us?
The number of things in a group
Draw an array for 4x5.
00000
00000
00000
00000
Make a number line to show this equation:
4 x 7 =
Start your number line at 0, then make a jump to 7, then a jump to 14, then to 21, and a final jump to 28
That is 4 jumps of 7
Write a multiplication equation to match this repeated addition and then solve:
5+5+5+5=
4x5=20
What number represents the product in this multiplication equation?
6 X 3 = 18
18
What does the number 3 represent in the expression
3 X 4?
a) The Product
b) The number of things in a group
c) The number of groups
d) The sum
C
Write a multiplication fact that is shown by this Array:
0000000
0000000
0000000
3 X 7 = 21
Make a number line to show this equation:
5 x 8 =
Start your number line at 0, make a jump to 8, then a jump to 16, then to 24, then to 32, then make a final jump to 40
That is 5 jumps of 8
Solve the multiplication equation using repeated addition:
8 X 5=
5+5+5+5+5+5+5+5=40
Use any strategy to solve this multiplication equation:
12 x 6 =
72
Draw equal groups to show 5 X 5 =
and write the completed equation.
Check over each team's drawing
When we multiply using arrays, what does the first factor tell us?
Example: 2 x 3 =
What does the 2 tell us?
The number of Rows
Make a number line to show this equation:
9 x 4 =
Start your number line at 0, then make a jump of 4, then a jump to 8, then to 12, then to 16, then to 20, then to 24, then to 28, then to 32, and a final jump to 36
That is 9 jumps of 4.
Write a multiplication equation to match the repeated addition and then solve:
9+9+9=
3 x 9 = 27
Mr. Dinter, Mrs. Narus, and Mrs. Sanford bought 3 bags of Skittles for the students in Room 1, Room 7, and Room 8. If each bag costs $5, how much did the teachers spend?
3 X 5=$15