3又5分之3乖25又5分之2加37.9乘6又5分之2的简便算法

3又5分之3乖25又5分之2加37.9乘6又5分之2的简便算法
=（3又3\/5+6又2\/5）×25又2\/5+12.5×6.4 =10×25又2\/5+80 =254+80 =334

3又3\/5*25又2\/5+37.9*6又2\/5有什么简便算法
3又3\/5*25又2\/5+37.9*6又2\/5 =3.6*25.4+25.4*6.4+12.5*6.4 =（3.6+6.4）*25.4+12.5*8*0.8 =10*25.4+100*0.8 =254+80 =334

3又五分之三×25又五分之二+37.9×6又五分之二
解：原式=3.6X25.4+37.9x6.4 =3.6X25.4+(25.4+12.5)X6.4 =(3.6+6.4)X25.4+12.5X6.4 =254+80 =334 希望能帮到你O(∩_∩)O哈哈~如有疑问欢迎追问。如果满意谢谢采纳。

谁有四年级上册数学简便计算题目?(有答案最好~) 格式为下: 例:44x25...
【思路导航】先去掉小括号，使4.75和8.25相加凑整，再运用减法的性质：a－b－c = a－（b＋c），使运算过程简便。所以 原式＝4.75+8.25－9.63－1.37 ＝13－（9.63+1.37）＝13－11 ＝2 .练习1 计算下面各题。1． 6.73－2 又8\/17+（3.27－1又9\/17）答 2. 7又5\/9－（3...

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3又五分之三×25又五分之二+37.9×6又五分之二 要求用简便算法
3又五分之三×25又五分之二+37.9×6又五分之二 =（3+3\/5）×25.4+37.9×（6+2\/5）=25.4×（3+3\/5+6+2\/5）+（37.9-25.4）×（32\/5）=25.4×10+12.5×8×（4\/5）=254+100×4\/5 =254+80 =334

3又3\/5*25又2\/5+37.9*6又2\/5有什么简便算法
3又3\/5×25又2\/5+37.9×6又2\/5 =（15\/5+3\/5）×（125\/5+2\/5）+37.9×（30\/5+2\/5）=18\/5×127\/5+37.9×32\/5 =2286\/25+1212.8\/5 =2286\/25+6064\/25 =8350\/25 =334

3又五分之三×25又五分之二+37.9×6又五分之二 要求用简便算法
(3+3\/5)×(25+2\/5)+37.9×(6+2\/5)=3.6×25.4+37.9×6.4 =3.6×25.4+(25.4+12.5)×6.4 =3.6×25.4+25.4×6.4+12.5×6.4 =3.6×25.4+25.4×6.4+12.5×8×0.8 =25.4×(3.6+6.4)+100×0.8 =254+80 =334 ...

3又五分之三×25又五分之二+37.9×6又五分之二 要求用简便算法
(3+3\/5)×(25+2\/5)+37.9×(6+2\/5)=3.6×25.4+37.9×6.4 =3.6×25.4+(25.4+12.5)×6.4 =3.6×25.4+25.4×6.4+12.5×6.4 =3.6×25.4+25.4×6.4+12.5×8×0.8 =25.4×(3.6+6.4)+100×0.8 =254+80 =334 ...

3又五分之三×25又五分之二+37.9×6又五分之二
(3+3\/5)×(25+2\/5)+37.9×(6+2\/5)=3.6×25.4+37.9×6.4 =3.6×25.4+(25.4+12.5)×6.4 =3.6×25.4+25.4×6.4+12.5×6.4 =3.6×25.4+25.4×6.4+12.5×8×0.8 =25.4×(3.6+6.4)+100×0.8 =254+80 =334 ...