简便运算(要详细过程):88+95+92+89+86+91+90+88+92+90+86+92+87+89+91+93+88+94+91+87

问题描述:

简便运算(要详细过程):88+95+92+89+86+91+90+88+92+90+86+92+87+89+91+93+88+94+91+87

88+95+92+89+86+91+90+88+92+90+86+92+87+89+91+93+88+94+91+87
=90x20+(-2+5+2-1-4+1+0-2+2+0-4+2-3-1+1+3-2+4+1-3)=1799