用简便算法算72乘0.98+7.2乘0.2

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/16 16:59:14
用简便算法算72乘0.98+7.2乘0.2用简便算法算72乘0.98+7.2乘0.2用简便算法算72乘0.98+7.2乘0.272乘0.98+7.2乘0.2=72×0.98+72×0.02=72×(0

用简便算法算72乘0.98+7.2乘0.2
用简便算法算72乘0.98+7.2乘0.2

用简便算法算72乘0.98+7.2乘0.2
72乘0.98+7.2乘0.2
=72×0.98+72×0.02
=72×(0.98+0.02)
=72×1
=72

72x0.98+7.2x0.2
=7.2x9.8+7.2x0.2
=7.2x(9.8+0.2)
=7.2x10
=72