Multiplication with Arrays and Repeated Addition

Draw and Array

100

4x3

row 1:  * * *
row 2:  * * *
row 3: * * *
row 4: * * *

200

5x2

row 1: * *
row 2: * *
row 3: * *
row 4: * *
row 5: * *

300

4x6

row 1: * * * * * *
row 2: * * * * * *
row 3: * * * * * *
row 4: * * * * * *

400

5x6

row 1: * * * * * *
row 2  * * * * * *
row 3: * * * * * *
row 4: * * * * * *
row 5: * * * * * *

500

3x7

row 1: * * * * * * *
row 2: * * * * * * *
row 3: * * * * * * *

Word problems

100

If Sam has 4 bags of candy, and each bag has 2 pieces of candy, then how many pieces of candy does she have?

8

200

Bob divided 5 pieces of candy between 4 friends. How many pieces of candy did he have to give away?

What is 20

300

If Tom has 6 packs of gum, and each pack has 4 pieces, then how many pieces of gum does he have?

24

400

Sally has 4 friends. She gives each friend 7 balloons. How many balloons did she give away?

28

500

Frank has 6 friends at his birthday party. He wants each friend to get 6 prizes. How many prizes does he need then?

36

Equal groups

100

If I have 10 kids that want to play soccer can I make two equal teams? Why or Why not?

row 1: * *
row 2: * *
row 3: * *
row 4: * *
row 5: * *
row 6: * *
row 7: * *
row 8: * *
row 9: * *
row 10: * * 

yes, 10 is an even number and can be divided by 2.

200

If there are 15 kids wanting to play soccer, can I make 2 equal teams? Why or why not?

team 1: * * * * * * * *
team 2: * * * * * * *

no, 15 cannot be dividing by 2 equally.

300

1 1 1 1 1 1 1 1 1 1 1 1 1 Can I make 3 equal groups with this number of students? Why or why not?

group 1: * * * * *
group 2: * * * *
group 3: * * * *

no, 13 cannot be dividing into three equal groups.

400

* * * * * * * * * * * * * * * * can i split this number into 4 equal groups?

group 1: * * * *
group 2: * * * *
group 3: * * * *
group 4: * * * *

yes, 16 can be split into 4 equal groups because 4x4 is 16

500

28 is this number even or odd? How do you know?

group 1: * * * * * * * * * * * * * *
group 2: * * * * * * * * * * * * * *

yes, it can be divided into 2 equal groups

Repeated Addition

100

what is the repeated addition for an array with 2 columns and 3 rows?

row 1: * *
row 2: * *
row 3: * *

2 x 3 = 6

200

what is the repeated addition for an array with 3 columns and 4 rows?

row 1: * * *
row 2: * * *
row 3: * * *
row 4: * * *

4 x 3 = 12

300

what is the repeated addition for an array with 4 columns and 5 rows?

row 1: * * * *
row 2: * * * *
row 3: * * * *
row 4: * * * *
row 5: * * * *

5 x 4 = 20

400

what is the repeated addition for an array with 2 columns and 7 rows?

row 1: * *
row 2: * *
row 3: * *
row 4: * *
row 5: * *
row 6: * *
row 7: * *

7 x 2 = 14

500

what is the repeated addition for an array with 6 columns and 5 rows?

row 1: * * * * * *
row 2: * * * * * *
row 3: * * * * * *
row 4: * * * * * *
row 5: * * * * * *

5 x 6 = 30

Multiplication

100

draw an array and tell the multiplication factor for 3 rows and 2 columns.

row 1: * *
row 2: * *
row 3: * *

3 x 2 = 6

200

draw an array and tell the multiplication factor for 4 rows and 3 columns.

row 1: * * *
row 2: * * *
row 3: * * *
row 4: * * *

4 x 3 = 12

300

draw an array and tell the multiplication factor for 5 rows and 3 columns.

row 1: * * *
row 2: * * *
row 3: * * *
row 4: * * *
row 5: * * *

5 x 3 = 15

400

draw an array and tell the multiplication factor for 6 rows and 4 columns.

row 1: * * * *
row 2: * * * *
row 3: * * * *
row 4: * * * *
row 5: * * * *
row 6: * * * * 

6 x 4 = 24

500

draw an array and tell the multiplication factor for 7 rows and 4 columns.

row 1: * * * *
row 2: * * * *
row 3: * * * *
row 4: * * * *
row 5: * * * *
row 6: * * * *
row 7: * * * *

7 x 4 = 28