Using commutative and associative properties, solve 5 × 7 × 2 × 2 × 8 × 5.

4500

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1500

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7200

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5600

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Solution

The correct option is D 5600
5 × 7 × 2 × 2 × 8 × 5

= 5 × (2 × 7) × 2 × (5 × 8)
[using commutative property]

= (5 × 2) × 7 × (2 × 5) × 8
[using associative property]

= 10 × 7 × 10 × 8

= 70 × 80

= 5600

Suggest Corrections

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