有理数计算题 (+16)-(-7)-(+11)+(-29)=?12-(-18)+(-7)-15=?
问题描述:
有理数计算题 (+16)-(-7)-(+11)+(-29)=?12-(-18)+(-7)-15=?
答
(+16)-(-7)-(+11)+(-29)
=16+7-11-29
=23-11-29
=12-29
=-17
12-(-18)+(-7)-15
=12+18-7-15
=30-7-15
=23-15
=8哦。。谢谢。。还有四道题目:(-7.1)-(6.8)-(-4.6)+(-6.8)5.6+(-0.9)+4.4+(-8.1)+(-0.1) -3-4+19-11+2-4.2+5.7-5.5+10.1