零点75×0点5+0点75×1点6×2+0点5×1点6×2脱式计算？ 5
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0.75×0.5+0.75×1.6×2+0.5×1.6×2
=0.75×0.5+0.75×3.2+0.5×3.2
=0.75×0.5+3.2×(0.75+0.5)
=0.75×0.5+3.2×1.25
=3/4×1/2+16/5×5/4
=3/8+4
=2又2/3+4
=6又2/3
=0.75×0.5+0.75×3.2+0.5×3.2
=0.75×0.5+3.2×(0.75+0.5)
=0.75×0.5+3.2×1.25
=3/4×1/2+16/5×5/4
=3/8+4
=2又2/3+4
=6又2/3
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