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Multiplication lesson 1

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# Multiplication lesson 1 - PowerPoint PPT Presentation

Multiplication lesson 1. Multiplying by 0 and 1. Multiplication vocabulary. Before we learn how to multiply, there are some important vocabulary words to know and understand... Multiplication : An operation that gives the total number when you join equal groups .

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### Multiplication lesson 1

Multiplying by 0 and 1

Multiplication vocabulary
• Before we learn how to multiply, there are some important vocabulary words to know and understand...
• Multiplication: An operation that gives the totalnumber when you join equalgroups.

Example: 4 + 4 + 4 + 4 = 16 or 4 x 4 = 16

• Factors: Numbers that are multiplied to give a product.

Example: 3 x 2 = 6 (3 and 2 are factors)

• Product: The answer to a multiplicationproblem.

Example: 5 x 2 = 10 (10 is the product)

Multiplication vocabulary continued
• Array: An array is a set of objects or numbers arrangedinorder, often in rows & columns.

Example:

Multiplication Factsare easiest to learn when...
• You find patterns.

Example: 2 x 7 = 14 can be found by counting by twos 2, 4, 6, 8, 10, 12, 14

• You use rhymes.

Example: 7 and 7 are doing fine, 7 times 7 is 49; 8 and 4 were sad and blue, 8 times 4 is 32

• You use stories.

Example: 7’s Tall Stories http://illuminations.nctm.org/Lessons/3-5/times6times7/SevensTallTales.mp3

• You use songs:

Example: School House Rock Multiplication Rock http://www.schoolhouserock.tv/Multiplication.html

How to multiply by zero (0)
• Rule: Any number times zero is alwayszero!

Zero Times Table

• 0 x 0 = 0
• 0 x 1 = 0 1 x 0 = 0
• 0 x 2 = 0 2 x 0 = 0
• 0 x 3 = 0 3 x 0 = 0
• 0 x 4 = 0 4 x 0 = 0
• 0 x 5 = 0 5 x 0 = 0
• 0 x 6 = 0 6 x 0 = 0
• 0 x 2 365 778 = 0
0 x 7 =

3 x 0 =

5 x 0 =

0 x 9 =

0 x 6 =

0 x 0 =

4 x 0 =

1 x 0 =

0

0

0

0

0

0

0

0

Now let’s practice the zero times tablesGet your pencil ready and answer the following questions
HOW TO MULTIPLY BY ONE (1)
• Rule: One times any number is the samenumber
• Groups: There is only one group

Example: 1 x 5 = 5, one group of 5 is 5

• Arrays: 3 rows of 1 is 3 1 row of 3 is 3

Example: 3 x 1 = 3 1 x 3 = 3

5 x 1 =

3 x 1 =

1 x 1 =

1 x 7 =

1 x 0 =

12 x 1 =

6 x 1=

1 x 4 =

5

3

1

7

0

12

6

4

Now let’s practice the one times tablesGet your pencil ready and answer the following questions