小学六年级简便计算1.(1/69+2/71)乘23+25除以712.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)3.1/2乘3+1/3乘4+.+1/19乘204.1/27+505/2727+131313/2727275.100-98+96-94+.+4-2
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![小学六年级简便计算1.(1/69+2/71)乘23+25除以712.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)3.1/2乘3+1/3乘4+.+1/19乘204.1/27+505/2727+131313/2727275.100-98+96-94+.+4-2](/uploads/image/z/1264223-47-3.jpg?t=%E5%B0%8F%E5%AD%A6%E5%85%AD%E5%B9%B4%E7%BA%A7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%971.%281%2F69%2B2%2F71%29%E4%B9%9823%2B25%E9%99%A4%E4%BB%A5712.%281%2B1%2F2%29%E4%B9%98%281-1%2F2%29%E4%B9%98%281%2B1%2F3%29%E4%B9%98%281-1%2F3%29%E4%B9%98.%E4%B9%98%281%2B1%2F9%29%E4%B9%98%281-1%2F9%293.1%2F2%E4%B9%983%2B1%2F3%E4%B9%984%2B.%2B1%2F19%E4%B9%98204.1%2F27%2B505%2F2727%2B131313%2F2727275.100-98%2B96-94%2B.%2B4-2)
小学六年级简便计算1.(1/69+2/71)乘23+25除以712.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)3.1/2乘3+1/3乘4+.+1/19乘204.1/27+505/2727+131313/2727275.100-98+96-94+.+4-2
小学六年级简便计算
1.(1/69+2/71)乘23+25除以71
2.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)
3.1/2乘3+1/3乘4+.+1/19乘20
4.1/27+505/2727+131313/272727
5.100-98+96-94+.+4-2
小学六年级简便计算1.(1/69+2/71)乘23+25除以712.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)3.1/2乘3+1/3乘4+.+1/19乘204.1/27+505/2727+131313/2727275.100-98+96-94+.+4-2
小学六年级简便计算
1.(1/69+2/71)乘23+25除以71
=1/69*23+2/71*23+25/71
=1/3+(46/71+25/71)
=1/3+1
=4/3
2.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘.乘(1+1/9)乘(1-1/9)
=3/2*1/2*4/3*2/3...*10/9*8/9
=1/2*10/9(中间的都约去了)
=5/9
3.1/2乘3+1/3乘4+.+1/19乘20
=1/2-1/3+1/3-1/4+...+1/19-1/20
=1/2-1/20
=9/20
4.1/27+505/2727+131313/272727
=1/27+5*101/(27*101)+13*10101/(27*10101)
=1/27+5/27+13/27
=19/27
5.100-98+96-94+.+4-2
=(100-98)+(96-94)+...(4-2)
=2+2+...+2(共有25个)
=2*25
=50
1.(1/69+2/71)乘23+25除以71
=23/69+46/71+25/71
=1/3+71/71=1又1/3.
2.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘........乘(1+1/9)乘(1-1/9)
=3/2*1/2*4/3*2/3*5/4*......10/9*8/9
=1/2*10/9
=10/18.
3.1/2乘3+1/3乘4+.......+1/19乘20
4.1/27+505/2727+131313/272727
5.100-98+96-94+....+4-2
那你