小学六年级难的奥数题简便运算及答案,急用
1\/1*3+1\/2*4+1\/3*5+1\/4*6+1\/5*7...1\/98*100+1\/99*101 =(1-1\/3+1\/2-1\/4+1\/3-1\/5+1\/4-1\/6+1\/5-1\/7+……+1\/98-1\/100+1\/99-1\/101)÷2 =(1+1\/2-1\/100-1\/101)÷2 =15049\/10100÷2 =15049\/20200 6分之1+12分之1+24分之1+48分之1+96分之1+1...
奥数题简便运算69x78十23x66
=69x78+69x22 =69x(78+22)=69x100 =6900
六年级奥数题简便运算,过程写全,我立刻采纳,谢谢!好人一生有好报...
10-0.4+100-0.4+……+100000-0.4=111108
小学奥数题如何简便运算?
解:原式=2×31+15\/26×2-56÷7-14\/13÷7 =62+15\/13-8-2\/13 =54+13\/13 =55.
求解小学六年级奥数题,简便运算,高手请进
小学六年级奥数题(简便运算) 第一题: 1997X0.3 1.2 1997 X 0.3 1.2 X 0.5 1997X0.3 + 4 X0.3X0.5 ——— + -——=--- + --- =--- 1999X0.5 1999 1999 X 0.5 1999 X 0.5 1999 X 0.5 (1997+4X0.5)X0.3 1999X0.3 0.3 3 =--- = --- ...
小学六年级奥数题(简便运算)
解:7 4\/5 + 77 4\/5 +777 4\/5 +1\/5 X 3 =7 4\/5 +1\/5 +77 4\/5 +1\/5 +777 4\/5+1\/5 =8+78+778 =864 (224 + 1\/222 ) X 1\/223 =(223+1+ 1\/222)×1\/223 =(223 +223\/222)× 1\/223 =223 × 1\/223 + 223\/222 × 1\/223 =1+1\/222 =1又 222...
六年级奥数题!急!
下来是简便运算 【1】 [14.8+(3又7分之二—1.5)×1又25分之3 ]÷4又5分之1 =[14.8+3又7分之2×1又25分之3-1.5×1又25分之3]÷4又5分之1 =[14.8+25分之92-25分之42]÷4又5分之1 =[14.8+2]×21分之5 =16.8×21分之5 =4 【2】=100又9\/40 go...
小学奥数题,要求简便运算。。
=4\/3+5\/4+6\/5+7\/6+8\/7+9\/8+10\/9 =1+1\/3+1+1\/4+1+1\/5+1+1\/6+1+1\/7+1+1\/8+1+1\/9 =7+(1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9)=7+7\/12+11\/30+15\/56+1\/9 =7+57\/60+135\/504+56\/504 =8-1\/20+201\/504 =8-126\/2520+1005\/2520 =8+879\/2520 =8又879...
几道小学六年级奥数题(简便运算)
1\/2*5+1\/3*5+1\/8*11+……+1\/20*23 = = 3\/4+7\/12-9\/20+11\/30-13\/42 =(1-1\/4+1\/4+1\/3-1\/4-1\/5+1\/5+1\/6-1\/6-1\/7)= 1+1\/3-1\/4-1\/7 =79\/84 2002\/1*3+2002\/3*5+2002\/5*7+2002\/7*9+2002\/9*11 =2002(1\/1*3+1\/3*5+...+1\/9*11)=2002[1\/...
这三道奥数题怎么做!!!(简便运算)
...+(1\/97-1\/100)+(1\/100-1\/103)=1-1\/103 =102\/103 其中第(2)、(3)还可以稍微变化一下:(2)1\/(1X3)+1\/(3X5)+...+1\/(99X101)(3)1\/(1X4)+1\/(4X7)+1\/(7X10)+...+1\/(100X103)如果直接给出这个 就比原题又难了一层。做题要学会总结!