题目内容
4.5×0.4+0.4×5.5．
分析：本题运用乘法分配律简算即可．
解答：解：4.5×0.4+0.4×5.5，
=（4.5+5.5）×0.4，
=10×0.4，
=4．
=（4.5+5.5）×0.4，
=10×0.4，
=4．
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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