199.199×198-198.198×199

来源:百度知道 编辑:UC知道 时间:2024/05/09 08:36:36
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199.199×198-198.198×199
=(199+0.199)*198-(198+0.198)*199
=199*198+0.199*198-198*199-0.198*199
=0.199*198-0.198*199
=0

199.199×198-198.198×199
=(200-0.801)×(200-2)-(200-1.802)(200-1)
=200×200-200×(2+0.801)+0.801×2-[200×200-200×(1.802+1)+1.802×1]
=0

199.199×198-198.198×199
=(199+0.199)*198-(198+0.198)*199
=199*198+0.199*198-[198*199+0.198*199]
=0.199*198-0.198*199
=100*(199*198)-100*(198*199)
=0

198*199+198*0.199-198*199-0.198*199
=198*0.199-0.198*199
=0.001(198*199-198*199)
=0

199.199×198-198.198×199
=1.001*199*198-1.001*198*199
=0