(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)简便计算
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(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)简便计算
(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)
=(23+34+65)+(23+34)*(23+34+65)-(23+34)-(23+34)*(23+34+65)
=23+34+65-(23+34)
=23+34+65-23-34
=65
不用楼上那么麻烦!
设A=23+34
原式
=(1+A)*(A+65)-(1+A+65)*(A)
=A²+A+65A+65-A²-A-65A
=65
(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)
=(23+34)+65+(23+34)²+65×(23+34)-【(23+34)²+66×(23+34)】
=66×(23+34)+65+(23+34)²-(23+34)²-66×(23+34)
=65
设x=23+34
原式=(x+1)(x+65)-(x+66)*x=x^2+66x+65-x^2-66x=65
原式=(1+23+34)*(23+34)+(1+23+34)*65-(1+23+34)*(23+34)-65*(23+34)
=(1+23+34)*(23+34)-(1+23+34)*(23+34)+(1+23+34)*65-65*(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