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+(5/20+4/20)+(3/21+7/21)+(3/24+8/24)+(5/35+7/35)
=1/3+3/4+2/5+5/7+7/8+1/4+1/5+1/7+1/3+1/8+1/3+1/7+1/5
=(1/3×3)+(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4/5
=4.8
=1/3+3/4+2/5+5/7+7/8+(5/20+4/20)+(3/21+7/21)+(3/24+8/24)+(5/35+7/35)
=1/3+3/4+2/5+5/7+7/8+1/4+1/5+1/7+1/3+1/8+1/3+1/7+1/5
=(1/3×3)+(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
=24/5
=4.8
计算: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+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)+(7\/8+1\/8)+(5\/7+1\/7+1\/7)=4+4\/5 =4.8 ...
如何计算1\/3+3\/4+2\/5+5\/7
如下：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 =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。...
3分之1+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...
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+5\/7+1\/7+1\/7+7\/8+1\/8 =1+1+4\/5+1+1 =4又5分之4 ...
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+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 ...
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
简算:1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35 要说明理由
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+(4\/20+5\/20)+(3\/21+7\/21)+ (3\/24+8\/24)+(5\/35+14\/35)=1\/3+3\/4+2\/5+5\/7+7\/8+1\/5+1\/4+1\/7+1\/3+1\/8+1\/3+2\/5+1\/7 =1\/3*3+(3\/4+1\/4)+(2\/5+1\/5+2\/5)+...
六年级简便计算:1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35=
六年级简便计算：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+2\/5+5\/7+7\/8+(4\/20+5\/20)+(3\/21+7\/21)+ (3\/24+8\/24)+(5\/35+14\/35) =1\/3+3\/4+2\/5+5\/7+7\/8+1\/5+1\/4+1...
两道简单的数学题,答得好加分
1.1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35 =(1\/3+5\/7+10\/21)+(3\/4+2\/5+9\/20)+(7\/8+11\/24)+19\/35 =32\/21+32\/20+32\/24+19\/35 =(32\/21+19\/35)+(32\/20+32\/24)=1\/7*(32\/3+19\/5)+8*(1\/5+1\/6)=1\/7*217\/15+44\/15 =31\/15+44\/15 =75\/...
请解:1\/2+1\/3+3\/4+2\/5+5\/7+7\/8+9\/20+10\/21+11\/24+19\/35
因为9\/20＝1\/4＋1\/5,10\/21＝1\/3＋1\/7,11\/24＝1\/3＋1\/8,19\/35＝2\/5＋1\/7.所以 原式 = 1\/2 +1\/3＋3\/4＋2\/5＋5\/7＋7\/8＋（1\/4＋1\/5）＋（1\/3＋1\/7）＋（1\/3＋1\/8）＋（2\/5＋1\/7）= 1\/2 +(1\/3+1\/3+1\/3) +(1\/4+3\/4) +(2\/5+1\/5+2\/5) +(...
