5.78×4.25 5.78×0.575用简便方法计算
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5.78×4.25
=2.89x2x4.25
=2.89x8.5
=(3-0.11)x(8+0.5)
=24-0.88+1.5-0.055
=25.5-0.935
=24.565
5.78×0.575
=2.89x2x0.575
=2.89x1.15
=(3-0.11)x(1+0.15)
=3-0.11+0.45-(如伏0.11x0.15)渣激携
=3.34-[(铅隐0.1+0.01)x0.15]
=3.34-0.015-0.0015
=3.34-0.0165
=3.3235
=2.89x2x4.25
=2.89x8.5
=(3-0.11)x(8+0.5)
=24-0.88+1.5-0.055
=25.5-0.935
=24.565
5.78×0.575
=2.89x2x0.575
=2.89x1.15
=(3-0.11)x(1+0.15)
=3-0.11+0.45-(如伏0.11x0.15)渣激携
=3.34-[(铅隐0.1+0.01)x0.15]
=3.34-0.015-0.0015
=3.34-0.0165
=3.3235
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