Repeated Addition
Complete the equation.
8 + 8 + 8 + 8 = 4 x ______
8
Show 7 x 2 on a number line.
14 and a number line
Draw an array to show the problem. Then solve.
5 x 6 = ______
30 and an array with 5 rows 6 columns.
Fill in the missing number.
5 x 3 = ___ x 5
3
Use a picture to solve.
14 / 7 =
2
Complete the equation.
9 + ___ + ___ = 3 x ___
9
Show 3 x 3 on a number line.
9 and a number line.
Draw an array to show the problem. Then solve.
2 x 9 = ______
18 and an array with 2 rows of 9.
Fill in the missing number.
8 x ____ = 4 x 8
4
Use a picture to solve.
24 / 3 =
8
Mark has 12 ears of corn to make table decorations. He arranges them in 2 groups of 6. How can you represent this? Choose all that apply.
A. 12 x 2
B. 2 + 2 + 2 + 2 + 2 + 2
C. 6 + 6
D. 2 x 6
E. 12 + 2 + 6
C & D
Suki invites 5 friends to a party. She gives each friend 2 party favors. How many party favors does she give out? Show how to find the answer using a number line.
10 favors and a number line.
Mr. Lopez planted 8 rows of apple trees on his farm. The apple trees are in 5 columns. How many trees are there in all?
40 trees
Use 5 x 2 = 2 x 5 to model the Commutative Property in two separate arrays.
one 2 x 5 array and one 5 x 2 array.
Use repeated subtraction to solve.
30 / 5 = _____
6
Jenna saves $5 each week. She wants to know how much money she has saved after 6 weeks. How can you represent this? Choose all that apply.
A. 5 + 5 + 5 + 5 + 5 + 5
B. 5 x 5
C. 5 + 6
D. 6 + 6 + 6 + 6 + 6
E. 5 x 6
A & E
In the last 5 months Stan read 3 books each month. How many books has he read in all? Show how to find the answer using a number line.
15 books and a number line.
Carole makes an array of magnets on her fridge. She makes 7 rows with 8 magnets in each row.Which of the following shows how to find the total number of magnets in Carole's array?
A. 7, 14, 21, 28, 35, 42, 49
B. 7 x 8
C. 7 + 7 + 7 + 7 + 7 + 7 + 7
D. 8 + 7
B
Define the Commutative Property of Multiplication.
The Commutative Property of Multiplication tells us that we can multiply the same factors in any order and the product will be the same.
Use repeated subtraction to solve.
42 / 6 =
7
Luke says you can ALWAYS multiply to join groups. Is he correct? Explain why or why not.
No- You can only multiply groups when the groups are equal.
A number line shows 4 jumps with 2 in each jump ending at 8. What do the 4 and 2 represent in the multiplication equation? What does the 8 represent?
The 4 & 2 are factors.
The 8 is the product.
Vince has 16 beads. Please draw AT LEAST 2 arrays he could make with his beads. Don't forget to include the sizes of the arrays.
1 x 16, 2 x 8, 4 x 4, 8 x 2, 16 x 1
Raymond says he can use the Commutative Property of Multiplication to show the product of 4 x 6 is the same as the product of 3 x 8. Is he correct? Why or why not?
No, the two multiplication products have different factors. The commutative Property of Multiplication only applies to products with the same factors.
How are multiplication and division different?
Multiplication is combining equal groups to find a total.
Division is taking a total and breaking it into equal groups.