5.28+0.72*9用简便方法计算!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 12:54:08
![5.28+0.72*9用简便方法计算!](/uploads/image/z/65626-34-6.jpg?t=5.28%2B0.72%2A9%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%21)
5.28+0.72*9用简便方法计算!
5.28+0.72*9用简便方法计算!
5.28+0.72*9用简便方法计算!
5.28+0.72×9
=5.28+0.72×(10-1)
=5.28+0.72×10-0.72×1
=5.28+7.2-0.72
=12.48-0.72
=12.48-1+0.28
=11.48+0.28
=11.66
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 12:54:08
5.28+0.72*9用简便方法计算!
5.28+0.72*9用简便方法计算!
5.28+0.72*9用简便方法计算!
5.28+0.72×9
=5.28+0.72×(10-1)
=5.28+0.72×10-0.72×1
=5.28+7.2-0.72
=12.48-0.72
=12.48-1+0.28
=11.48+0.28
=11.66