=(1/3+1/8)+1/3+3/4+2/5+5/7+7/8+(1/4+1/5)+(1/3+1/7)+(1/5+1/7)
=1/3+1/8+1/3+3/4+2/5+5/7+7/8+1/4+1/5+1/3+1/7+1/5+1/7
=1/3+1/3+1/3+1/8+7/8+3/4+1/4+2/5+1/5+1/5+5/7+1/7+1/7
=1+1+1+4/5+1
=4+4/5
=4又4/5
=1/3+1/8+1/3+3/4+2/5+5/7+7/8+1/4+1/5+1/3+1/7+1/5+1/7
=(1/3+1/3+1/3)+(1/8+7/8)+(3/4+1/4)+(2/5+1/5+1/5)+(5/7+1/7+1/7)
=1+1+1+4/5+1
=4又4/5
...之1加4分之3+5分之2+7分之5+8分之7+20分之9+21分之10+35分之12...
24分之11+3分之1加4分之3+5分之2+7分之5+8分之7+20分之9+21分之10+35分之12 =1\/3+1\/8+1\/3+3\/4+2\/5+5\/7+7\/8+1\/4+1\/5+1\/3+1\/7+1\/5+1\/7 =(1\/3+1\/3+1\/3)+(1\/8+7\/8)+(3\/4+1\/4)+(2\/5+1\/5+1\/5)+(5\/7+1\/7+1\/7)=1+1+1+4\/5+1 =4又4...
...+4分之3+5分之2+7分之5+8分之7+20分之9+21分之10+24分之11+35分之...
=1\/3+3\/4+2\/5+5\/7+7\/8+(1\/4+1\/5)+(1\/3+1\/7)+(1\/3+1\/8)+(1\/5+1\/7)=1\/3+1\/3+1\/3+3\/4+1\/4+2\/5+1\/5+1\/5+5\/7+1\/7+1\/7+7\/8+1\/8 =1+1+4\/5+1+1 =4又5分之4
3分之一+4分之一+5分之二+7分之五+8分之七+20分之九+21分之十+24分之...
这是考察通分和分配率的知识的：（1\/3+5\/7+10\/21）+（1\/4+2\/5+9\/20）+（7\/8+11\/24）+12\/35 =32\/21+11\/10+4\/3+12\/35 =（32\/21+4\/3）+（11\/10+12\/35）=30\/7+101\/70 =401\/70 希望能够帮到你！
3分之1加4分之3加5分之2加7分之5加8分之7加20分之9加21分之10加24分之...
可以把20分之9拆开成1\/4+1\/5，21分之10拆开成1\/3+1\/7，24分之11拆开成1\/3+1\/8，35分之19拆开成2\/5+1\/7。再跟前面的 3分之1加4分之3加5分之2加7分之5加8分之7 相加，可得5.
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+12\/35怎么算简便方法?
=1\/3+3\/4+2\/5+5\/7+7\/8+1\/4+1\/5+1\/3+1\/7+1\/3+1\/8+1\/5+1\/7 =4\/5 小学数学简便方法归纳 1、提取公因式：这个方法实际上是运用了乘法分配律，将相同因数提取出来，考试中往往剩下的项相加减，会出现一个整数。2、借来借去法：看到名字，就知道这个方法的含义。用此方法时，需要...
计算:1\/3+3\/4+2\/5+7\/5+7\/8+9\/20+10\/21+11\/24+12\/35
因为9\/20=1\/4+1\/5，10\/21=1\/3+1\/7，11\/24=1\/3+1\/8，12\/35=1\/5+1\/7。所以:1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+12\/35 =1\/3+3\/4+2\/5+5\/7+7\/8+1\/4+1\/5+1\/3+1\/7+1\/3+1\/8+1\/5+1\/7 =(1\/3+1\/3+1\/3)+(3\/4+1\/4)+(2\/5+1\/5+1\/5)...
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+12\/35=
解: 1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+12\/35 =1\/3+3\/4+2\/5+5\/7+7\/8+(1\/4+1\/5)+(1\/3+1\/7)+(1\/3+1\/8)+(1\/5+1\/7)=(1\/3+1\/3+1\/3)+(1\/4+3\/4)+(2\/5+1\/5+1\/5)+(5\/7+1\/7+1\/7)+(7\/8+1\/8)=4+4\/5 =4又4\/5 ...
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35 =(1\/3+3\/4+7\/8+11\/24)+(2\/5+9\/20)+(5\/7+10\/21+19\/35)=(8\/24+18\/24+21\/24+11\/24)+(8\/20+9\/20)+(75\/105+50\/105+57\/105)=29\/12+17\/20+26\/15 =145\/60+51\/60+104\/60 =300\/60 =5 ...
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35小学题目
图
计算:1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35=? 计算[(5又1\/4...
1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35=91\/20 [（5又1\/4-4.25）×5\/8]÷3\/8+3.3÷1又5\/6 =52\/15
