Topic 4 Multiplication

Arrays

100

Jenn has a tray of cookies.  There are 3 rows and 5 columns.  Draw the array.

See student answer.

200

XXXXXXX

XXXXXXX

Write a number sentence for this array

2x7=a=14

300

An arrangement of rows and columns is called an ______________.

What is an array?

400

XX

XX

XX

Write both number sentences for this array.

What is 

2x3 = 6

3x2 = 6

500

Ronda has a sticker collection that is 4 rows and 5 columns.  Write an addition equation to find the total number of stickers she has.

BONUS - write a multiplication sentence to show the number of stickers she has.

What is 4 + 4 + 4 + 4 + 4 = 20 stickers

What is 4 x 5 = s = 20 stickers

Multiplication sentences

100

9 x 7 = 63

7 x s = 63

What number is s?

What is 9?

200

5 x 3 = 3 x f

Find f.

What is 5?

300

A marching band has 3 rows of band members.  Each row has 8 students. Write a number sentence, use a variable, and find the total number of band members.

What is 3 x 8 = b = 24 band members?

400

5 x g = 20

Find g

What is 4?

500

write a multiplication number sentence that shows 6+6+6+6.

What is 6 x 4 = 24?

Solve the Problem

100

Julianna earns 3$ for washing dogs.  If she washes 7 dogs, how much money does she earn?

What is 3 x 7 = m = 21 dollars?

200

Sue has 4 boxes of chocolate bars.  Each box has 10 bars inside.  How many chocolate bars are there in all?

What is 4 x 10 = 40 bars?

300

Ben planted flowers in his garden.  He planted 3 rows of 8 flowers.  How many flowers did he plant in all?

What is 3 x 8 = f = 24 flowers?

400

Peter says that 5+ 5 + 5 + 5 + 5 is equal to 25.  Tom says that 5x5 = 25.  What is right?

They both are right.  25=25?

500

Write a number story that could be solved with 5 x 8.

Bonus - Solve 5 x 8

See answers

Bonus - 5 x 8 = 40

Facts

100

2 x 9

What is 18

200

10 x 5

what is 50?

300

5 x 9

What is 45?

400

3 x 4 

What is 12?

500

6 x 4

What is 24?

Popourri

100

Write the number 4, 320 in expanded form.

What is 4000 + 300 + 20?

200

5 x 3 = 3 x 5 is an example of what multiplication property?

A) Commutative Property

B) The Zero Property

C) The multiplication property

What is the Commutative Property?

300

456 rounded to the nearest hundred is 

a) 400

b) 450

c) 500

What is 500?

400

Which story shows 7 x 8 ?

a) Todd bought 7 bags of apples.  Each bag had 8 apples.  How many apples did Todd buy?

b) Rachel baked 7 cookies.  She then baked 8 cookies.  How many cookies did Rachel bake in all?

What is A?

500

Follow the pattern and complete the table

Shelves  1    2     3       4      5

Books     5    10    15     ?      ?

What is 20 and 25?