36.2*1.638+6.38*6.38,用简便方法
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36.2*1.638+6.38*6.38,用简便方法
36.2*1.638+6.38*6.38
=3.62*16.38+6.38*6.38
=3.62*10+3.62*6.38+6.38*6.38
=36.2+6.38*(3.62+6.38)
=36.2+6.38*10
=36.2+63.8
=100
=3.62*16.38+6.38*6.38
=3.62*10+3.62*6.38+6.38*6.38
=36.2+6.38*(3.62+6.38)
=36.2+6.38*10
=36.2+63.8
=100