32+31-30-29+28+27-26-25.+8+7-6-5+4+3-2-1
=32-30+31-29+28-26+27-25.
明白了吧
32-30=2,31-29=2,28-26=2.
以此类推.你看这个式子就是加法交换律的变形,也就是15个2相加,最后得30
简算：32+31-30-29+28+27-26-25.+8+7-6-5+4+3-2-1=
简算：32+31-30-29+28+27-26-25.+8+7-6-5+4+3-2-1=
怎么简算?请各位大侠支招~急.
怎么简算?请各位大侠支招~急.
数学人气：552 ℃时间：2020-03-11 10:46:40
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