0.123×1.23×0.45+1.23×0.45简便运算？
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0.123×1.23×0.45+1.23×0.45
=1.123×1.23×0.45
=1.123×0.0615*0.9
=1.123×（0.0615-0.00615）
=1.123*0.05535
=0.05535+0.005535+0.02*0.05535+0.003*0.05535
=0.06215805
=1.123×1.23×0.45
=1.123×0.0615*0.9
=1.123×（0.0615-0.00615）
=1.123*0.05535
=0.05535+0.005535+0.02*0.05535+0.003*0.05535
=0.06215805
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