18.1×(0.9+5.要求用简便算法做出来 谁能帮帮
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18.1×(0.9+5.要求用简便算法做出来 谁能帮帮
18.1×(0.9+5.要求用简便算法做出来 谁能帮帮
18.1×(0.9+5.要求用简便算法做出来 谁能帮帮
详细一点?
18.1×(0.9+5.9)
=(18+0.1)×【(1-0.1)+(6-0.1)】
=(18+0.1)×(1-0.1)+(18+0.1)×(6-0.1)
=(18+0.1)×1-0.1×(18+0.1)+(18+0.1)×6-0.1×(18+0.1)
=(18+0.1)×7-0.2×(18+0.1)
=18×7-0.2×18+0.1×7-0.2×0.1
=126-3.6+0.7-0.02
=123.08
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=18.1×6.8
=18.1×7-18.1×0.2
=126.7-3.62
123.08
18.1×(0.9+5.9)
=(18+0.1)×【(1-0.1)+(6-0.1)】
18.1×(0.9+5.9)
=18.1*{(1-0.1)+(6-0.1)}
=18.1*(1-0.1)+18.1*(6-0.1)
=18.1-1.81+18.1*6-1.81
=123.08
18.1×(0.9+5.9)
=18.1×[(1-0.1)+(6-0.1)]
=(18.1×1-18.1×0.1)+(18.1×6-18.1×0.1)
=123.08
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by:希
18.1×(0.9+5.9)
=(18+0.1)×(0.9+5.9)
=自己算吧
18.1*(1-0.1)+18.1*(6-0.1)=
18.1×(0.9+5.9)=18.1x6.8=181x68/100=[181x(70-2)]/100=(12670-362)/100=12308/100=123.08