用简便方法计算:0.22+0.44+0.66+0.88+1.1+1.12+2.24+3.36+4.48+5.60 和7.8569+8.5697+5.6978+6.9785+9.7856这是两个算式
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/20 13:48:07
![用简便方法计算:0.22+0.44+0.66+0.88+1.1+1.12+2.24+3.36+4.48+5.60 和7.8569+8.5697+5.6978+6.9785+9.7856这是两个算式](/uploads/image/z/54602-26-2.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A0.22%2B0.44%2B0.66%2B0.88%2B1.1%2B1.12%2B2.24%2B3.36%2B4.48%2B5.60+%E5%92%8C7.8569%2B8.5697%2B5.6978%2B6.9785%2B9.7856%E8%BF%99%E6%98%AF%E4%B8%A4%E4%B8%AA%E7%AE%97%E5%BC%8F)
用简便方法计算:0.22+0.44+0.66+0.88+1.1+1.12+2.24+3.36+4.48+5.60 和7.8569+8.5697+5.6978+6.9785+9.7856这是两个算式
用简便方法计算:0.22+0.44+0.66+0.88+1.1+1.12+2.24+3.36+4.48+5.60 和
7.8569+8.5697+5.6978+6.9785+9.7856
这是两个算式
用简便方法计算:0.22+0.44+0.66+0.88+1.1+1.12+2.24+3.36+4.48+5.60 和7.8569+8.5697+5.6978+6.9785+9.7856这是两个算式
7.8569+8.5697+5.6978+6.9785+9.7856 看规律
个位数是 5.6.7.8.9
0.1位 也是5.6.7.8.9
0.01位.
原始=35+35*0.1+35*0.01+35*0.001+35*0.0001
=35*(1+0.1+0.01+0.001+0.0001)
=35*1.1111=38.8885