1樓：甜冪冪糖
41.2×8.1+11×1.25+53.7×1.9=41.2×(10-1.9)+(10+1)×1.25+53.7×1.9
=412-41.2×1.9+12.
5+1.25+53.7×1.
9=412+(53.7-41.2)×1.
9+12.5+1.25=412+12.
5×(2-0.1)+12.5+1.
25=412+25-1.25+12.5+1.
25=412+25+12.5
=449.5
或者：41.2×8.
1+11×1.25+53.7×1.
9=41.2×(10-1.9)+(10+1)×1.
25+(41.2+12.5)×1.
9=412-41.2×1.9+12.5+1.25+41.2×1.9+12.5×1.9
=412+12.5+1.25+12.
5×1.9=412+12.5+1.
25+12.5×(2-0.1)=412+12.
5+1.25+25-1.25=412+37.
5=449.5這真是一道很難的題啊！%>_<%
2樓：
41.2*8.1+41.2*1.9+12.5*1.9+11*1.25
=412+1.25*19+11*1.25=412+1.25*30=449.5
3樓：玉杵搗藥
41.2×8.1+11×1.25+53.7×1.9=41.2×(10-1.9)+(10+1)×1.25+53.7×1.9
=412-41.2×1.9+12.
5+1.25+53.7×1.
9=412+(53.7-41.2)×1.
9+12.5+1.25=412+12.
5×(2-0.1)+12.5+1.
25=412+25-1.25+12.5+1.
25=412+25+12.5
=449.5
或者：41.2×8.
1+11×1.25+53.7×1.
9=41.2×(10-1.9)+(10+1)×1.
25+(41.2+12.5)×1.
9=412-41.2×1.9+12.5+1.25+41.2×1.9+12.5×1.9
=412+12.5+1.25+12.
5×1.9=412+12.5+1.
25+12.5×(2-0.1)=412+12.
5+1.25+25-1.25=412+37.
5=449.5
4樓：滑韋茂
41.2*(8.1+1.9)+12.5*(1.1+1.9)=412+37.5=449.5
拆53.7*1.9為41.2*1.9+12.5*1.9
找8.1補數
41.2*8.1+11*1.25+53.7*1.9要求簡便計算
5樓：邢琲
41.2*8.1+11*1.25+53.7*1.9=41.2*(8+0.1)+(10+1)*1.25+53.7*(2-0.1)
=329.6+4.12+12.5+1.25+107.4-5.37=449.5
41.2*8.1+11*1.25+53.7*1.9怎樣簡便計算？ 10
6樓：魚小溪
41.2*8+10*1.25+53.7*2+4.12+1.25-5.37
7樓：匿名使用者
解:41.2x8.
1十11.1x1.25十53.
7x1.9=41.2x(10一1.
9)十1.25x(11十0.1)十 53.
7x1.9
=41.2x10一41.2x1.9十1.25x11十1.25x0.1十53.7x1.9
=412十(53.7x1.9一41.
2x1.9)十0.125=412十1.
9x(53.7十41.2)十0.
125=412十1.9x94.9十0.
125=412.125十94.9x(2一0.1)=412.125十189.8一9.49
=601.025一9.49
=591.535
41.2*8.1+11*9 1/4+53.7*1.9 簡便計算！！
8樓：陽光的小凡
先說41.8乘8.1，可以看成41.8乘8再加個4.18。不知你滿意不？我數學也不好，呵呵。
簡便計算 41.2*8.1+11*1.25+53.7*1.9
9樓：真心教師
簡便計算 41.2*8.1+11*1.
25+53.7*1.941.
2x8.1+11x1.25+53.
7x1.9=(412x81+11x125+537x19)/100=(412x80+412+10x125+125+537x20-537)/100
=[32960+1250+10740+(412+125-537)]/100
=[(32960+40)+(1250+10700)+0]/100=[33000+11950]/100
=44950/100
=449.5
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