0.61*67.1+32.9-0.329*39简便方法？
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0.61X67.1十32.9一0.329X39
=0.61X67.1十（32.9一32.9X0.39）
=0.61X67.1十（1一0.39）X32.9
=0.61X67.1十0.61X32.9
=0.61X（67.1十32.9）
=0.61X100
=61
=0.61X67.1十（32.9一32.9X0.39）
=0.61X67.1十（1一0.39）X32.9
=0.61X67.1十0.61X32.9
=0.61X（67.1十32.9）
=0.61X100
=61
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这道题不能简便运算，
0.61x67.1+32.9-0.329x39
=40.931+32.9-12.831
=73.831-12.831
=61
0.61x67.1+32.9-0.329x39
=40.931+32.9-12.831
=73.831-12.831
=61
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