1234567891*1234567891-1234567890*1234567892=?
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1234567891*1234567891-1234567890*1234567892=?
1234567891*1234567891-1234567890*1234567892=?
1234567891*1234567891-1234567890*1234567892=?
1234567891*1234567891-1234567890*1234567892
=1234567891²-(1234567891-1)(1234567891+1)
=1234567891²-1234567891²+1
=1
设1234567891=x,
则式子转化为x*x-(x-1)*(x+1)=1
设n=1234567891
则原式 n^2-(n-1)*(n+1)=n^2-(n^2-1)=1
1
1
1234567891*1234567891-1234567890+1234567892=?
1234567891*1234567891-1234567890*1234567892=?
全对者给50财富123456789-----------------------------------------------------------------------------------------------------------1234567891(的平方,上面有个小2)—1234567890x1234567892上面-----是分数线还有好多题 是六年
1234567891*1234567891-1234567890*1234567892=?讲清原因
123456789
123456789,
1234567890/1234567891-1234567890×1234567892
(1234567891)2-1234567890×1234567892
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123456789+123456789
123456789+123456789-123456789+1
123456789/123456789+123456789=?
问一道简算题1234567891*1234567891-1234567890*1234567890
123456789*123456789/123456789-123456789+123456789=?
123456789+123456789+123456789+123456789+123456789=
123456789÷123456789×123456789=
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