16.5×0.2÷2.5×0.4简便运算怎么计算
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16.5×0.2÷2.5×0.4
=16.5×0.2×2/5×0.4
=16.5÷5×0.2×2×0.4
=3.3×0.2×（2×0.4）
=0.66×0.8
=0.6×0.8+0.06×0.8
=0.48+0.048
=0.528
=16.5×0.2×2/5×0.4
=16.5÷5×0.2×2×0.4
=3.3×0.2×（2×0.4）
=0.66×0.8
=0.6×0.8+0.06×0.8
=0.48+0.048
=0.528
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