4.73-[2 +2/3-(1+4/5+2.63)]-1/3数学题,要有过程

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4.73-[2 +2/3-(1+4/5+2.63)]-1/3数学题,要有过程

4.73-[2 +2/3-(1+4/5+2.63)]-1/3数学题,要有过程
4.73-[2 +2/3-(1+4/5+2.63)]-1/3
数学题,要有过程

4.73-[2 +2/3-(1+4/5+2.63)]-1/3数学题,要有过程
=4.73-[2+2/3+1/3-4.43]
=4.73-3+4.43
=9.16-3
=6.16