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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 (the_fizicx99):
A.
OpenStudy (anonymous):
explain
OpenStudy (the_fizicx99):
2 + .1 is the same as 2.10 So basically add .1 to 2 and multiply it by 16... which is 33.6.
OpenStudy (the_fizicx99):
Understand?
OpenStudy (anonymous):
yes
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OpenStudy (the_fizicx99):
Ok Gl!
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