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OpenStudy (anonymous):
Which expression will help make the following problem easier to solve using mental math? Robert bought 15 lollipops that cost $1.40 each. 15(1) + 1(0.4) 15 • (1 + 0.4) 1 • (15 + 0.4) 15(0.4) + 0.4(1)
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OpenStudy (shamil98):
one lollipop = 1.40 for 15 you would use: 15(1.4) Option B. 15 * ( 1 + .04) = 15 * (1.40)
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