0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/02 02:21:28
0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
0.325*0.8+0.55/5/4-3/5/8/7
=0.325*0.8+0.55*0.8-3/5×7/8
=(0.325+0.55)×0.8-3/5×7/8
=7/8×0.8-0.6×7/8
=7/8×(0.8-0.6)
=7/8×1/5
=7/40
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/02 02:21:28
0.325*0.8+0.55/5/4-3/5/8/7=?(简算)
0.325*0.8+0.55/5/4-3/5/8/7
=0.325*0.8+0.55*0.8-3/5×7/8
=(0.325+0.55)×0.8-3/5×7/8
=7/8×0.8-0.6×7/8
=7/8×(0.8-0.6)
=7/8×1/5
=7/40