Arrays
Draw an array to show 3 x 5.
x x x x x
x x x x x
x x x x x
Write a multiplication equation for the equal groups.
x x x x x x
x x x x x x
4 x 3 = 12
What number goes in the blank?
8 x 6 = 8 x (3 + ___)
3
4 x 8
32
Ryan bought 6 toy cars that were $2 each. He also bought 5 fidgets that were $3 each. How much money did he spend in all?
6 x 2 = 12
5 x 3 = 15
12 + 15 = $27
What multiplication equation is shown by this array?
o o o o o o
o o o o o o
2 x 6 = 12
Draw equal groups to represent this equation: 6 x 4.
x x x x x x x x
x x x x x x x x
x x x x x x x x
What number goes in the blank?
9 x 7 = (____ + 5) x 7
4
9 x 5
45
Haley went to Rosa's and ordered 3 taco plates. Each taco plate was $9. If she paid with $30, what change did she get back?
3 x 9 = 27
30 - 27 = $3
Draw an array that shows 4 x 7.
x x x x x x x
x x x x x x x
x x x x x x x
x x x x x x x
x x x x x x x
x x x x x x x
No, they are not equal groups.
What numbers go in the blanks?
6 x 6 = 6 x (5 + 1)
= ( ___ x 5) + ( ___ x 1)
6 and 6
6 x 7
42
Tina make 4 batches of 9 cookies. Paul made 5 batches of 8 cookies. Who made more cookies? How many more?
4 x 9 = 36
5 x 8 = 40
Paul made 4 more cookies.
Explain the difference in an array that shows 3 x 8 and an array that shows 8 x 3.
3 x 8 is 3 rows of 8.
8 x 3 is 8 rows of 3.
Write a multiplication equation for the equal groups.
x x x x x x
x x x x x x
x x x x x x
9 x 2 = 18
Show one way to solve 8 x 8 using the distributive property.
Example:
8 x (4 + 4)
=(8 x 4) + (8 x 4)
=32 + 32
=64
8 x 8
64
Carol has 50 stickers to decorate cards for her friends. How many cards can she make if she uses 9 stickers on each card? How many stickers will be left over?
9 x 5 = 45
So she can make 5 cards and has 5 stickers left over.
You have an array of 3 x 6 stickers. Your friends add 3 more rows to your array. How many stickers do you have now?
3 more rows mean you have 6 rows of 6. So you have 6 x 6 = 36 pictures.
Draw equal groups to represent the multiplication equations.
7 x 6
oooooo oooooo
oooooo oooooo
oooooo oooooo
oooooo
Show how to use the distributive property of subtraction to find 9 x 7.
(10 - 1) x 7
=(10 x 7) - (1 x 7)
= 70 - 7
= 63
8 x 7
56
Lisa made cupcakes. She has boxes that will fit 6 rows of 2 cupcakes. If she fills up 4 boxes, how many cupcakes did she make?
6 x 2 x 4 = 48