1又1/5+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42 要简算
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发布时间:2024-10-04 15:39
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热心网友
时间:2024-10-19 17:25
1又1/5+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42
=1+1/5+3+1/6+5+1/12+7+1/20+9+1/30+11+1/42
=1+3+5+7+9+11+1/5+1/6+1/12+1/20+1/30+1/42
=(1+11)*6/2+1/5+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7
=36+1/5+1/2-1/7
=36+14/70+35/70-10/70
=36+39/70
=36又39/70
热心网友
时间:2024-10-19 17:20
1又1/2+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42
=(1+3+5+7+9+11)+(1/2+1/6+1/12+1/20+1/30+1/42)
=(1+11)×6/2+(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7)
=36+1-1/7
=36+6/7
=36又6/7
热心网友
时间:2024-10-19 17:27
=(1+ 1/5)+(3 +1/6)+(5 +1/12)+(7 +1/20)+(9 +1/30)+(11 +1/42)
=(1+3+5+7+9+11)+(1/5 + 1/2 -1/3 + 1/3 -1/4 +1/4 - 1/5 +1/5 -1/6 +1/6 -1/7 )
=36+(1/5 +1/2 -1/7)
=36+39/70
=36又39/70
提示一下1/6 =1/2- 1/3 ,1/12 =1/3 -1/4 。。。。
热心网友
时间:2024-10-19 17:26
1又1/5+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42
=1+1/5+3+1/6+5+1/12+7+1/20+9+1/30+11+1/42
=(1+3+5+7+9+11)+1/5+(1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7)
=36+1/5+1/2-1/7
=36+35/70+14/70-10/70
=36+39/70
=36又39/70
热心网友
时间:2024-10-19 17:20
1又1/5+3又1/6+5又1/12+7又1/20+9又1/30+11又1/42
=(1+3+5+7+9+11)+(1/5+1/6+1/12+1/20+1/30+1/42 )
=(1+11)×3+(1/5+1/2—1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7)
=36+(1/5+1/2-1/7)
=36+39/70
=36又39/70
补充1/2—1/3=1/6
1/3-1/4=1/12