actingkendall actingkendall

10-01-2018
Mathematics

contestada

write an expression that can be used to find 4 times 275 using mental math and properties of numbers.

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altavistard altavistard

10-01-2018

Rough estimate: 4 times 300 = 1200

Properties of numbers: 4 times (300-25) = 4 times 300 - 4 times 25
= 1200 - 100
= 1100 (exact answer)

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SuccessfulArizona SuccessfulArizona

10-01-2018

(200×4) + (70×4) + (5×4)

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