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OpenStudy (anonymous):
Which expression will help make the following problem easier to solve using mental math? Arsha wants to buy 16 gallons of gasoline, which cost $2.10 per gallon. 16 • (2 + 0.1) 16(2) + 2(0.1) 2 • (16 + 0.1) 16(0.1) + 0.1(2)
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OpenStudy (anonymous):
i think mentally the second one
OpenStudy (anonymous):
32+.2=32.2
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