问题标题:
初一的相反数那节课的,-(+7)+(-9)+(+8.07)-(-7/2)-[-(-5)]
问题描述:
初一的相反数那节课的,-(+7)+(-9)+(+8.07)-(-7/2)-[-(-5)]
童晓艳回答:
-(+7)+(-9)+(+8.07)-(-7/2)-[-(-5)]
=-7-9+8.07+3.5-5
=-21+11.57
=-9.43
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