(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
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(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)(123456789/123456788-123456788/1
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
=(1+1/123456788-(1-1/123456789))除以(1/123456788+1/123456789)
=(1+1/123456788-1+1/123456789))除以(1/123456788+1/123456789)
=(1/123456788+1/123456789))除以(1/123456788+1/123456789)
=1
计算器(123456789/123456788-123456788/123456789)/(1/123456788+1/123456789) = 1.0000000079113
123456788×123456790-123456789×123456789,
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
123456789×123456789-123456788×123456790=?
123456788-123456787*123456789
123456789²-（123456788*123456790）
123456789加123456788一直加到一
(123456789/123456788-123456788/123456789)÷(1/123456788+1/123456789)简便算法
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123456789的2次方-123456788x123456790
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