用简便算法计算(15.2-9.9)-(4.3-2.54)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 17:30:51
![用简便算法计算(15.2-9.9)-(4.3-2.54)](/uploads/image/z/246708-36-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%8815.2-9.9%29-%284.3-2.54%EF%BC%89)
用简便算法计算(15.2-9.9)-(4.3-2.54)
用简便算法计算(15.2-9.9)-(4.3-2.54)
用简便算法计算(15.2-9.9)-(4.3-2.54)
(15.2-9.9)-(4.3-2.54)
=(15.2-(10-0.1))-((4+0.3)-2.54)
=(15.2-10+0.1)-4-0.3+2.54
=5.3-0.3-4+2.54
=3.54
没怎么看懂,你的意思是怎么口算么 (15.2-10+0.1)-(4.54-2.54-0.24)=3.54
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