(191919/989898+190190/980980+19001900/98009800)÷19/98×9898/1919=_．
问题描述：
(
+191919 989898
+190190 980980
)÷19001900 98009800
×19 98
=______． 9898 1919
答
(
+191919 989898
+190190 980980
)÷19001900 98009800
×19 98
，9898 1919
=(
+19×10101 98×10101
+190×1001 980×1001
)÷1900×10001 9800×10001
×19 98
，98×101 19×101
=(
+19 98
+19 98
)×19 98
×98 19
，98 19
=3×
×19 98
×98 19
，98 19
=
，294 19
=15
；9 19
故答案为：15
．9 19