52.47-10.38-6.74的简便方法?
2个回答
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52.47-10.38-6.74
=52.47-(10.37+0.01)-6.74
=52.47-10.37-0.01-6.74
=42.1-(6.74+0.01)
=42.1-6.75
=42.1-(7-0.25)
=42.1-7+0.25
=35.1+0.25
=35.35
=52.47-(10.37+0.01)-6.74
=52.47-10.37-0.01-6.74
=42.1-(6.74+0.01)
=42.1-6.75
=42.1-(7-0.25)
=42.1-7+0.25
=35.1+0.25
=35.35
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