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

asked May 19, 2019 48.4k views

2 votes

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1 vote

(200×4) + (70×4) + (5×4)

Bibiana answered May 21, 2019

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1 vote

Rough estimate: 4 times 300 = 1200

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

Amit Tiwari answered May 25, 2019

5.7k points

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