5.2×6.4+0.48×6.4
=(5.2+0.48)×6.4
=5.68×6.4
=36.352

看了追问,知道楼主的题目出错了.

5.2×6.4+0.48×64
=5.2×6.4+4.8×6.4
=(5.2+4.8)×6.4
=10×6.4
=64