Arrays
What is an array made up of?
Equal groups of rows and columns
What is repeated addition?
adding the same number over and over
What is the product in an multiplication sentence?
The answer
fives
Andrew has 3 packs of stickers. Each pack has 5 stickers. How many stickers does he have?
Solve any way you wish.
5+5+5=15 stickers
3x5=15 stickers
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xxxxx
xxxxx
Draw an array for
3 rows and 3 columns
x x x
x x x
x x x
Write a repeated addition sentence for 3 groups of 4
4+4+4=12
Write a multiplication sentence for
3 groups of 3
3x3=9
2x8= ?
16
(2 groups of 8)
Brielle has 2 bowls of grapes. Each bowl has 9 grapes. How many grapes does she have in all?
9+9=18 grapes
2x9=18 grapes
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Draw an array for
5 rows of 4
x x x x
x x x x
x x x x
x x x x
x x x x
Write a repeated addition sentence for this array:
xxxxx
xxxxx
xxxxx
5+5+5=15
3+3+3+3+3=15
Write a multiplication sentence for
4+4+4
4x3=12
3x4=12
4x10=?
40
(4 groups of 10)
Gavin has 8 apples and Valencia has 6 apples. How many apples do they have in all?
8+6=14 apples
(you can't multiply because you don't have equal groups)
Draw an array for
2+2+2+2
x x
x x
x x
x x
Write a repeated addition sentence from this:
2x4
2+2+2+2=8
4+4=8
Write a multiplication sentence for this array
xxxxxx
xxxxxx
2x6=12
6x2=12
5x5
25
(5 groups of 5)
Mia has 3 bracelets, each one has 4 beads.
Alexa has 2 bracelets, each one has 6 beads.
Do they have the same number of beads?
Yes
3x4=12 (4+4+4)
2x6=12 (6+6)
Draw an array with 6 total dots.
xxxxxx
x x
x x
x x
x x x
x x x
x
x
x
x
x
x
Write a repeated addition sentence from this
5x4
5+5+5+5=20
4+4+4+4+4=20
Write a multiplication sentence
5 rows of 1
5x1=5
10x10
100
Can you come up with your own multiplication word problem?
Teacher will tell you if you are correct