81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 06:51:59
![81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5](/uploads/image/z/27214-70-4.jpg?t=81%E5%8F%881%2F7%2A7%2F8%2B71%E5%8F%881%2F6%2A6%2F7%2B61%E5%8F%881%2F5%2A5%2F6%2B51%E5%8F%881%2F4%2A4%2F5)
81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5
81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5
81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5
81又1/7*7/8+71又1/6*6/7+61又1/5*5/6+51又1/4*4/5
=(80+8/7)x7/8+(70+7/6)x6/7+(60+6/5)x5/6+(50x5/4)x4/5
=70+1+60+1+50+1+40+1
=224
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秒酒回答正解
81又1/8+71又1/7……+51又1/5=81+71+61+51+1/8+1/7+1/6+1/5=264又533/840