STRATEGIES FOR MULTIPLICATION

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# STRATEGIES FOR MULTIPLICATION - PowerPoint PPT Presentation

STRATEGIES FOR MULTIPLICATION. COMPLETE NUMBER STRATEGIES PARTITIONING STRATEGIES COMPENSATION STRATEGIES USING MULTIPLES OF 10 AND 100 TWO DIGIT MULTIPLIERS (The area model). COMPLETE NUMBER STRATEGIES. Repeated addition: 73 X 4 = 73

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## PowerPoint Slideshow about 'STRATEGIES FOR MULTIPLICATION' - lilith

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### STRATEGIES FOR MULTIPLICATION

COMPLETE NUMBER STRATEGIES

PARTITIONING STRATEGIES

COMPENSATION STRATEGIES

USING MULTIPLES OF 10 AND 100

TWO DIGIT MULTIPLIERS (The area model)

COMPLETE NUMBER STRATEGIES

Repeated addition: 73 X 4 =

73

+ 73 73

146 73 146

+ 73 73

219 73 146 292

+ 73

292

PARTITIONING STRATEGIES
• Breaking numbers up in a variety of ways that reflect an understanding of base 10.

27 X 4 268 X 6

20 X 4 = 80 200 X 6 = 1200

7 X 4 = 28 60 X 6 = 360

108 8 X 6 = 48

1608

COMPENSATION STRATEGIES

Looking for strategies to manipulate

numbers so the calculations are easier

(more familiar).

Double/Half: 27 X 4

3 X 18 30 X 4 = 120

(3 X 2) X (18 / 2) - 3 X 4 = 12

6 X 9 108