[________-（5.5+8.1）]×4.5=44.1136÷[________-（4.8-2.6）]=27.2．
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23.4 7.2
解析分析：将空格当作未知数，根据等式的性质解方程即可求解．
解答：令空格为x，则[x-（5.5+8.1）]×4.5=44.1，???????x-（5.5+8.1）=9.8，??????????????x-13.6=9.8，???????????????????x=23.4；???????????????????? 令空格为x，则136÷[x-（4.8-2.6）]=27.2，???????x-（4.8-2.6）=5，?????????????? x-2.2=5，?????????????????? x=7.2．故