12345*12345-12344*12346的简便计算

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12345*12345-12344*12346的简便计算

12345*12345-12344*12346的简便计算
12345*12345-12344*12346的简便计算

12345*12345-12344*12346的简便计算
12345*12345-12344*12346
=12345²-（12345-1）*（12345+1）
=12345²-12345²+1
=1

=12345*12345-(12345-1)*(12345+1)
=12345*12345-(12345*12345-1*1)
=1

12345*12345-12344*12346
=12345²-（12345-1）*（12345+1）
=12345²-12345²+1
=1

987654321×12345-987654322×12344 123454321/12345*12345-12346*12344= 12345*12345-12344*12346的简便计算 12345²12344×12346＝?12345²-12344×12346＝? 12345²-12344×123456= 12345²-12344*12346= 不是123154321除以12345*12345-12346*12344是123454321除以12345*12345-12346*12344 问123454321÷（12345×12345-12346×12344)=? 比较12345分之12344和12346分之12345的大小 12345*12346-12344*12343 求简便运算 12345*12346-12344*12343简便运算 12345的平方-12344×12346-1 简便计算54321×12345-54322×12344 12345二次方-12344乘12346 12345的2次方-12344×12346= 12345*98765-12344*98766的解法1 12345 12345