
1个回答
展开全部
98.6*98.6-98.5*98.7
=98.6*98.6-98.5*(98.6+0.1)
=98.6*98.6-98.5*98.6-9.85
=98.6*(98.6-98.5)-9.85
=9.86-9.85
=0.01
=98.6*98.6-98.5*(98.6+0.1)
=98.6*98.6-98.5*98.6-9.85
=98.6*(98.6-98.5)-9.85
=9.86-9.85
=0.01
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