(-191919×9898+989898×1919)÷(-0.5+3.14)=

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(-191919×9898+989898×1919)÷(-0.5+3.14)=

(-191919×9898+989898×1919)÷(-0.5+3.14)=
(-191919×9898+989898×1919)÷(-0.5+3.14)=

(-191919×9898+989898×1919)÷(-0.5+3.14)=
-191919*9898+989898*1919)/(-0.5+3.14)
=(-19*10101*98*101+98*10101*19*101)/(-0.5+3.14)
=0/(-0.5+3.14)
=0

(-191919×9898+989898×1919)= (-9898×191919+989898×1919)= - [(98×101×19×10101 )] + [98×10101×19×101] = 0 本人原创 抄着必死

(-191919×9898+989898×1919)÷(-0.5+3.14)
=[(980000+9898)×1919-(190000+1919)×9898]/(-0.5+3.14)
=(980000×1919+9898×1919-190000×9898-1919×9898)/(-0.5+3.14)
=0/(-0.5+3.14)
=0

(-191919×9898+989898×1919)÷(-0.5+3.14)
=(-1899614262+1899614262)÷(-0.5+3.14)
=0