=1/2/(3/2)+1/3/(4/2)+1/4/(5/2)+...+1/99/(100/2)
=2/(2×3)+2/(3×4)+2/(4×5)+...+2/(99×100)
=2×(1/2-1/3)+2×(1/3-1/4)+2×(1/4-1/5)+...+2×(1/99-1/100)
=2×(1/2-1/100)
=49/50
小學六年級奧數題(簡單運算)第壹道題:
1997 X 0.3 1.2 1997 X 0.3 1.2 X 0.5 1997 X 0.3+4 X 0.3 X 0.5
———— + -——= - + - = -
1999 X 0.5 1999 1999 X 0.5 1999 X 0.5 1999 X 0.5
(1997+4x 0.5)x 0.3 1999 x 0.3 0.3 3
= - = - = - = -
1999X0.5
問題2:(從上壹步往前數)
1 1 1989 1
壹:- =。
1990 1989 X 1990 1989 X 1990 1989 X 1990
1989 + 1 1990 1
= - = - = -
1989 X 1990 1989 X 1990 1989
1 1 1
第二(繼續加之前):- + - = -
1988 X 1989 1989 1988
根據這壹定律，可以得出最後的結果應該是:
1
-
1986
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和222部分1
幾道小學六年級奧數題(簡單運算)1/1 * 3+1/3 * 5+1/5 * 7+...+1/47 * 49.
= 1/2(1-1/3)+........1/2(1/47-1/49)
= 1/2(1-1/3+1/3-1/5+.......+1/47-1/49)
=24/49
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[1/2(1-1/3)+1/2(1/3-1/5)+...+1/2(1/9-1/11)
=2002*5/11
=910
小學六年級奧數簡單運算第壹題，
原公式= 1/3(1/(1 * 2 * 3)-1/(2 * 3 * 4)+1/(2 * 3 * 4)-1/(。
=1/3*(1/(1*2*3)-1/8*9*10))
=119/2160
第二個問題:
原公式= 10+1/7+10+1/6+10+1/4。
=40+(1/7+1/6+1/5+1/4)
=40+319/420
第三個問題:
原公式=(26/5)*(5/16)-(5/3)*(7/10)
=13/8-7/6
=5/8-1/6
=11/24
9999×9999+19999=9999×(10000-1)+19999=99990000-9999+19999=100000000
找幾個簡單的方法計算小學六年級成績和六年級成績...等我們打到* * *湖，蠶就被克制住了。
啊！