
4-3 Multiplication with Arrays
Presentation
•
Mathematics
•
3rd Grade
•
Practice Problem
•
Medium
Standards-aligned
Lea Esteve
Used 245+ times
FREE Resource
10 Slides • 6 Questions
1
4-3 Multiplication with Arrays
by Lea Esteve
2
This is an array.
An array is a group of objects arranged in rows and columns.
Rows go across.
Columns go down.
3
Let's try one together......Pair (shoulder partner) -
How many rows?
How many columns?
4
Multiple Choice
How many rows?
How many columns?
3 rows
4 columns
4 rows
4 columns
3 rows
3 columns
4 rows
4 columns
5
There are different ways to figure out how many total circles are in this array.
4 + 4 + 4 =12
You can add up the circles in each row.
4 , 8, 12
You can skip count by 4 three times.
4 8 12
4
4
4
6
You can multiply the number of rows by the number in each row.
1. 2. 3. 4.
1
2
3
7
Let's try one together......
Think (on your own) -
How many rows?
How many colums
8
Let's try one together......Pair (shoulder partner) -
How would you write a repeated addition sentence to match this array?
9
Multiple Choice
Which of the following shows a repeated addition sentence to match this array?
4 + 4 + 4 + 4 = 16
4 + 4 + 4 = 12
10
Let's try one together......Pair (shoulder partner)
How would you write a multiplication equation to match this array?
11
Multiple Choice
How would you write a multiplication equation to match this array?
4 x 4 x 4 x 4 = 16
4 x 4 = 16
12
Important to remember.....
The number of rows always goes before the number of columns.
How many rows? How many columns?
There are 2 rows of 6 columns. So that means there are 2 groups of 6.
When writing a repeated addition sentence, the sentence should show 2 groups of 6.
13
Multiple Choice
Which of the following repeated addition sentences match this array?
6 + 6 + 6 + 6 + 6 + 6 = 12
6 + 6 = 12
14
Important to remember.....
The number of rows always goes before the number of columns.
How many rows? How many columns?
There are 2 rows of 6 columns. So that means there are 2 groups of 6.
When writing a multiplication equation, the equation should show 2 groups of 6. We can replace the words "groups of" with a multiplication symbol.
15
Multiple Choice
Which of the following multiplication equations match this array?
2 x 6 = 12
6 x 6 = 12
16
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4-3 Multiplication with Arrays
by Lea Esteve
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