如题所述
2.5×1.5+2.5×1.6×1.5
=2.5×1.5+2.5×2.4
2.5×(1.5+2.4)
=2.5×3.9
=2.5×(4-0.1)
=2.5×4-2.5×0.1
=10-0.25
=9.75追答
=2.5×1.5+2.5×2.4
2.5×(1.5+2.4)
=2.5×3.9
=2.5×(4-0.1)
=2.5×4-2.5×0.1
=10-0.25
=9.75追答
不简算就直接算
=3.75+6
=9.75
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