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Jack broke apart 5x216 as (5x200)+(5x16) to multiply mentally. What strategy did Jack use?

Jack broke apart 5x216 as (5x200)+(5x16) to multiply mentally. What strategy did Jack use?
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Jack broke apart 5x216 as (5x200)+(5x16) to multiply mentally. What strategy did Jack use?

User Nevine
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Mental math if that's what you mean
User Srj
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8.3k points
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