Jack’s Marbles4th Grade Mathematics

Middle Childhood Mathematics and Language Arts (4-9)

Sierra HeroldClick to Begin!

Multiplying• Simplifies addition and saves time!• Process of calculating the total number that is

added together a certain amount of times• The answer to a multiplication problem is called a product.

Example:3 5 means adding 3 together 5 times OR 3 3 3 3 3 15 So 3 5 15.

Next

Multiply One Digit Numbers

1. Multiply the two numbers together

2. Align you product in a column under the line

3 2 6

Next

Multiply Two Digit Numbers1. Begin the problem by multiplying the bottom number on the right

side with the top number on the right side. (Ex: 6 x 5= 30)2. Align the product under the ones digit and regroup if necessary. 3. Multiply the bottom number of the right side with the top number on

the left side. (Ex: 6 x 1= 6)4. Add any regrouping from step 2 to your number. (Ex: 6 + 3= 9)5. Align the number under the line in the tens digit.

15 6

3

15 6 0

3

15 6 0

3

15 6 0

3

15 690

Step 1 Step 2 Step 3 Step 4 Step 5

Click to Begin Quiz!

Question 1

7 3

21

18

10

25

IncorrectDouble check your work!

Remember 7 x 3 is the same as adding 7 together 3 times.

Try Again!

Correct!

Great Job!7 x 3 = 21

Next

Question 2

17 8

25

125

136

153

IncorrectDouble check your work!

Remember 17 x 8 is the same as adding 17 together 8 times.

Try Again!

Correct!Great Job!

17 x 8 = 136

Next

Question 3Jack has 8 marbles in each box. How many marbles are in 6 boxes?

50 30

48 42

IncorrectDouble check your work! Remember having 6 boxes

with 8 marbles in each box is the same as 8 x 6.

Try Again!

Correct!Great Job!8 x 6 = 48

Play Again!Next

Conclusion• Throughout this PowerPoint you have learned how to

multiply one digit numbers and two digit numbers.• For one digit numbers you multiply the numbers together. • For two digit numbers you multiply the bottom number by

the top right number then the top left number. • Your answer, the product, is aligned under the line in the

corresponding column.

Next

References

• http://www.dadsworksheets.com/v1/Worksheets/Word%20Problems/Easy_Multiplication_Word_Problems_V2.html

• http://go.hrw.com/resources/go_sc/hst/HSTMW031.PDF

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