99又997/998除以1/499
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![99又997/998除以1/499](/uploads/image/z/11323835-35-5.jpg?t=99%E5%8F%88997%2F998%E9%99%A4%E4%BB%A51%2F499)
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99又997/998除以1/499
99又997/998除以1/499
99又997/998除以1/499
99又997/998÷1/499
=99又997/998×499
=(100-1/998)×499
=100×499-1/998×499
=49900-1/2
=49899又1/2