1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42（请找出规律计算,）

来源：学生作业帮助网编辑：作业帮时间：2024/05/03 22:43:10

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42（请找出规律计算,）
1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42（请找出规律计算,）

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42（请找出规律计算,）
1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-(2+3)/6+(3+4)/12-(4+5)/20+(5+6)/30-(6+7)/42
=1-2/6-3/6+3/12+4/12-4/20-5/20+5/30+6/30-6/42-7/42
=1-1/3-1/2+1/4+1/3-1/5-1/4+1/6+1/5-1/7-1/6
=1-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/2-1/7
=1-1/2-1/7
=1/2-1/7
=5/14

5/6= 1/2 +1/3
7/12 =1/3 +1/4
9/20 =1/4+1/5
11/30 =1/5+1/6
13/42=1/6+1/7
1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-1/2 -1/3+1/3 +1/4-1/4-1/5+1/5+1/6-1/6-1/7
=1/2-1/7
=5/14

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)
=1-1/2-1/7
=5/14

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)
=1-1/2-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/7
=1-1/2-1/7
=1/2-1/7
=5/14

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
= (1+1)/2 + (2+3)/6 + (3+4)/12 - (4+5)/20 + (5+6)/30 - (6+7)/42
=1/2 +1/2 - 2/6 - 3/6 + 3/12 + 4/12 - 4/20 - 5/20 + 5/30 + 6/30 - 6/42 - 7/42
=1/2 - 1/7
5/14

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-(2+3)/6+(3+4)/12-(4+5)/20+(5+6)/30-(6+7)/42
=1-2/6-3/6+3/12+4/12-4/20-5/20+5/30+6/30-6/42-7/42
=1-1/3-1/2+1/4+1/3-1/5-1/4+1/6+1/5-1/7-1/6
=1-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/2-1/7
=1-1/2-1/7
=1/2-1/7
=5/14
全部过程不许复制我的

1 - 5/6 + 7/12 - 9/20 + 11/30 - 13/42
=1-(2+3)/2*3+(3+4)/3*4-(4+5)/4*5+(5+6)/5*6-(6+7)/6*7
=1-(1/2+1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6)-(1/6+1/7)
=1-1/2-1/7
=5/14

（1/2-5/9+5/6-7/12)*(-36)=? (1/2-3-5/9+5/6-7/12)*(-36) 1+2+3+4+5+6+7+8+9+12 11/30+9/20+7/12-5/6+1/2 6/7×5/9+4/9×6/7（简便计算） 0.8-（2/3+1/12）×8/9 5/6÷（6-5/12-7/12 急*2**7******12**7*5*5***3*9***9*4**8*3**5*6**1*7**8*2***8*7***6*9*6**41******3**5* 1/2+3/2:；1/6+5/6；1/12+7/12；1/20+9/20：第五个是（） (1/2-5/9+7/12)*(-36) 9×9数独 -2-8----9 -1--2-6-- -----52-- 7---32-4- --4-9-8-- -9--1---3 --12----- --9-5--6- 4----9-3- （1/2 - 5/9 + 5/6 - 7/12）÷（-1/36） [5/2-(7/9-11/12+1/6)*36]*1/5 谁能算24点?（4 11 8 9）（2 13 1 10 ）（7 13 4 5）（5 11 12 6）（7 7 7 7）（9 9 9 9 ）6 6 6 6 等于26 6 6 6 等于 37 7 7 7 等于137 7 7 7 等于159 9 9 9 等于11 1 2 3 巧算二十四点比如6 6 6 6就是6+6+6+61 2 13 11 2 5 10 12 4 5 6 7 4 8 11 12 4 12 1 18 1 2 3 4 13 6 12 12 6 9 13 5 1 2 7 7 1 3 4 8 3 8 9 12 2 7 9 13 8 9 11 13 3 5 6 7 5 7 10 11 7 8 9 12 2 4 11 13 3 6 7 8 1 3 10 12 2 5 9 13 3 7 10 13 1 5 9 11 6 数学1-（5/2+3/1）,8/7-12/5+6/1,12/11-4/1-3/1,7/2+（9/4+7/5）写出过程 3/2+7/3+7/4 9又5/4-2又7/2-1又7/5 10/4+12/5+10/6 12/5+6/1+12/7+6/5 等于多少?用简便的计算 2又1/2-(7/9-11/12+1/6)×36]÷5简便运算 [2又2分之1-(9/7-12/11+6/1)×36]÷5 -2又1/2减(7/9-11/12+1/6)×36}除以5