Arrays
What is an array? What do arrays contain?
Objects arranged in equal rows and columns.
Skip count by 3's to solve 9 x 3.
3, 6, 9, 12, 15, 18, 21, 24, 27
Solve 20 divided by 4. Show your work with a count by.
4, 8, 12, 16, 20
20 divided by 4 = 5
What does RDWW stand for?
Read the problem
Draw a model
Write a number sentence
Write a word sentence
Draw 4 rows of 3. What is the total?
The teacher will show a model on the board. The total is 12.
3 packs of Pokemon cards, 10 cards in each pack. What is the product? Draw a tape diagram to show your work.
The product is 30.
Teacher will check the tape diagram.
9 x 4 = 36
What is the related division fact?
36 divided by 4= 9
or
36 divided by 9= 4
What do we call the numbers we multiply in a multiplication sentence?
factors
Draw 2 rows of 7. What is the total?
The teacher will show a model on the board. The total is 14.
Leo has 4 packs of 8 markers. What does the 4 represent?
the number of groups
There are a total of 18 pencils. Each student gets two pencils. How many students get pencils? Draw a tape diagram to show your work.
9 students get pencils.
The teacher will show the correct tape diagram.
What is the quotient in a division sentence?
The answer in division
(groups or size)
Name the array.
* * * * *
* * * * *
* * * * *
3 rows of 5
Leo has 4 packs of 8 markers. What does the 8 represent?
the size
Henry organizes 21 books equally on 3 shelves. How many books does he put on each shelf? Draw an array to show your work.
* * * * * * *
* * * * * * *
* * * * * * *
Henry puts 7 books on each shelf.
3 x 5 = 15
5 x 3 = 15
What is this an example of?
The Commutative Property
Name the array and write the multiplication number sentence.
* *
* *
* *
* *
* *
5 rows of 2
5 x 2 = 10
Leo has 4 packs of 8 markers. How many markers does he have? Solve using RDWW.
Teacher will show on their board.
There are 24 players equally divided into 4 teams. How many players on each team? Use RDWW to show your work.
There are 6 players on each team.
Use the Distributive Property to solve 7 x 4
(5 x 4) + ( __ x 4) =
____ + ____ = ____
(5 x 4) + (2 x 4)
20 + 8 = 28