
能简便就简便。7.28+3.2/2.5 44.28/0.9/4.1
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7.28+3.2/2.5
=7.28+3.2×4/(2.5×4)
=7.28+12.8/10
=7.28+1.28
=8.56
44.28/0.9/4.1
=49.2/4.1
=12
=7.28+3.2×4/(2.5×4)
=7.28+12.8/10
=7.28+1.28
=8.56
44.28/0.9/4.1
=49.2/4.1
=12
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