
5点4乘2点1减0点34乘21用简便方法怎么做
1个回答
展开全部
原式
=5.4x2.1-0.34x21
=5.4x2.1-0.34x10x2.1
=5.4x2.1-3.4x2.1
=(5.4-3.4)x2.1
=2x2.1
=4.2
=5.4x2.1-0.34x21
=5.4x2.1-0.34x10x2.1
=5.4x2.1-3.4x2.1
=(5.4-3.4)x2.1
=2x2.1
=4.2
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询