(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)=?要简便算法!
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(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)=?要简便算法!
(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)=?要简便算法!
(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)=?要简便算法!
(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)
=(23+34)×(23+34+65)+(23+34+65)-(1+23+34+65)×(23+34)
=(23+34)×(23+34+65-1-23-34-65)+(23+34+65)
=-(23+34)+(23+34)+65
=65
令a=23+34
所以原式=(1+a)(a+65)-(1+a+65)a
=(1+a)a+65(1+a)-(1+a)a-65a
=65(1+a)-65a
=65+65a-65a
=65
(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)
= (1+23+34)×(23+34+65)-(1+23+34)x(23x34)-65x(23+34)
= (1+23+34)x(23x34)+65x(1+23+34)-(1+23+34)x(23x34)-65x(23+34)
=65x(1+23+34)-65x(23+34)
=65+65x(23+34)-65x(23+34)
=65
(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)简便计算
(1+23+34)×(23+34+65)-(1+23+34+65)×(23+34)=?要简便算法!
java统计一个数组中各个元素出现的次数,如 int a[]={2,34,23,2,54,23,65,34,1,65};
34—23等于
英语23,34题
1+12++23+34+45+56
1*2+23+34+45+56+...+99100
23*45+34+56
12+23+34+...+89=?
23秒,34年是什么意思
1+12+23+34+45+56+67+78+89.+10000000
1×2+23+34+45+.99100=?简算.
65,34,54,25,76,43,23两个数字加起来如何等于77 88 99
32*23+46*34怎么简算
23加34等于几啊
23'34'45'56'89,的英文
41+(-23)+(-34)+0
从23题到34题.急