题目内容
90.5×99+90.5．
分析：把90.5分成90.5×1，然后运用乘法分配律简算．
解答：解：90.5×99+90.5，
=90.5×99+90.5×1，
=90.5×（99+1），
=90.5×100，
=9050．
=90.5×99+90.5×1，
=90.5×（99+1），
=90.5×100，
=9050．
点评：乘法分配律是常用的简便运算的方法，要熟练掌握，灵活运用．
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