Intro to Multiplying

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# Intro to Multiplying - PowerPoint PPT Presentation

Intro to Multiplying. What you “know”. Times tables to ________ Rules for multiplying integers. What we need to understand. There are patterns and tricks that can help us get better at our times tables. There are reasons that the rules for multiplying integers work out like they do.

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## PowerPoint Slideshow about 'Intro to Multiplying' - colby-gordon

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### Intro to Multiplying

What you “know”

Times tables to ________

Rules for multiplying integers

What we need to understand

There are patterns and tricks that can help us get better at our times tables.

There are reasons that the rules for multiplying integers work out like they do.

MULTIPLICATION saves us the time and trouble of repeated addition.

The first 3 slides are timed problems from our times tables

The faster you answer correctly, the more points you earn.

1. Multiply: 7 x 7
• 35
• 42
• 49
• 56
• 81

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2. Multiply: 3 x 12
• 15
• 30
• 32
• 36
• 42

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3. Multiply: 5 x 9
• 45
• 50
• 55
• 56
• 72

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4. Evaluate: -6 x 4
• -24
• -2
• 2
• 24

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5. Evaluate: (-3)x(-7)
• -21
• -10
• 10
• 21

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6. Evaluate: 10(-2)
• -20
• -8
• 8
• 20

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What is another way to represent8. 6 + 6 + 6 + 6 + 6 ?
• 36
• 6 x 6 x 6 x 6 x 6
• 65
• 6 x 5
• 66,666

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9. Each person who joins the club pays \$25 in dues. If 4 people join, which of the following gives the total amount of dues?I. 25 + 25 + 25 + 25II. 25 x 4 III. 25 + 4

• I only
• II only
• III only
• I and II, not III
• I and III, not II

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• .
• .
• .
• .

-6

-3

0

-15

-12

-9

-6

-3

0

-15

-12

-9

6

9

12

-3

0

3

6

9

12

-3

0

3

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