下面的题目你能用简便算法计算吗? 0.85+2.7+15% =? 37×0.39-27×39% =?
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0.85+2.7+15% =(0.85+0.15)+2.7=0.2+2.7=2.9
37×0.39-27×39%=37X0.39-27x0.39=0.39x(37-27)=0.39X10=3,9
37×0.39-27×39%=37X0.39-27x0.39=0.39x(37-27)=0.39X10=3,9
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2012-11-12
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你是小学的吧?
0.85+2.7+15%=85%+2.7+15%=3.7
同理37×0.39-27×39%=(37-27)×0.39=3.9
0.85+2.7+15%=85%+2.7+15%=3.7
同理37×0.39-27×39%=(37-27)×0.39=3.9
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0.85+2.7+15%
=0.85+2.7+0.15
=1+2.7
=3.7
37×0.39-27×39%
=37*0.39-27*0.39
=0.39*(37-27)
=0.39*10
=3.9
=0.85+2.7+0.15
=1+2.7
=3.7
37×0.39-27×39%
=37*0.39-27*0.39
=0.39*(37-27)
=0.39*10
=3.9
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