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这题怎么简便计算?
2个回答
2018-06-17 · 知道合伙人教育行家
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0.125x6.4+2.5x0.5
=0.125x8x0.8+1.25
=1x0.8+1.25
=0.8+1.25
=2.05
=0.125x8x0.8+1.25
=1x0.8+1.25
=0.8+1.25
=2.05
追答
0.125x6.4x2.5x0.5
=0.125x8x0.4x2x2.5x0.5
=(0.125x8)x(0.4x2.5)x(2x0.5)
=1x1x1
=1
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