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Seek The Multiplication TreasurePowerPoint Presentation

Seek The Multiplication Treasure

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Seek The Multiplication Treasure

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Seek The Multiplication Treasure

2009-2010

1

342

x 23

3 4 2

x 3

10

2

6

Since 4 • 3=12 Carry the 1 and write down the 2

Multiply 4 • 3

Multiply 3 • 2

Multiply 3 • 3 + 1

Now you will multiply the top factor by the tens digit in the second factor. In this problem, you multiply by the 2 in the tens place or 20.

342

x 23

3 4 2

x 3

2

10

2

6

Since the 2 actually represents 2 tens or 20, we will want to put a zero in the ones place in the second row of our work before we multiply anything else.

342

x 23

3 4 2

x 3

2

10

2

6

0

342

x 23

3 4 2

x 3

2

10

2

6

6

8

4

0

There are two digits in the second factor.

342

x 23

3 4 2

x 3

2

10

2

6

6

8

4

0

There are two digits in the second factor.

one

two

342

x 23

3 4 2

x 3

2

10

2

6

6

8

4

0

There are two digits in the second factor.

one

two

+

342

x 23

3 4 2

x 3

2

10

2

6

6

8

4

0

+

342

x 23

3 4 2

x 3

2

10

2

6

6

8

4

0

7

8

6

6

914

x 48

+

1

914

x 48

7312

3656

0

43,872

+

5

5

6

6

767

x 89

6903

6136

0

68,263

Are you up to the adventure of finding the multiplication treasure? Remember X (multiplication) marks the spot!

Choose from the following problems, at least two from each column. Solve them on Multiplication Graph Paper and pass in to your teacher. (Don’t forget to write your name on your paper.)

- 32 X 26
- 28 X 18
- 46 X 22
- 53 X 34
- 125 X 23

- 532 X 16
- 208 X 58
- 246 X 31
- 53 X 344
- 2,125 X 24

To Review the Demonstration again, click on the Treasure Chest.