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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

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strategies for multiplication

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
COMPLETE NUMBER STRATEGIES

Repeated addition: 73 X 4 =

73

+ 73 73

146 73 146

+ 73 73

219 73 146 292

+ 73

292

partitioning strategies
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
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