1计算,简便方法+2.8×0.55+12.5×0.44?
2个回答
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2.8×0.55+12.5×0.44
=2.8×5×0.11+12.5×4×0.11
=0.11×(14+50)
=0.1×64+0.01×64
=6.4+0.64
=7.04
=2.8×5×0.11+12.5×4×0.11
=0.11×(14+50)
=0.1×64+0.01×64
=6.4+0.64
=7.04
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2.8×0.55+12.5×0.44
=0.44x(3.5+12.5)
=0.44x16
=0.11x64
=0.01x64+0.1x64
=0.64+6.4
=7.04
=0.44x(3.5+12.5)
=0.44x16
=0.11x64
=0.01x64+0.1x64
=0.64+6.4
=7.04
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