51又2/3*3/5+71又3/4*4/7+91又4/5*5/9
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 06:17:56
![51又2/3*3/5+71又3/4*4/7+91又4/5*5/9](/uploads/image/z/132147-27-7.jpg?t=51%E5%8F%882%2F3%2A3%2F5%2B71%E5%8F%883%2F4%2A4%2F7%2B91%E5%8F%884%2F5%2A5%2F9)
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51又2/3*3/5+71又3/4*4/7+91又4/5*5/9
51又2/3*3/5+71又3/4*4/7+91又4/5*5/9
51又2/3*3/5+71又3/4*4/7+91又4/5*5/9
51又2/3*3/5+71又3/4*4/7+91又4/5*5/9
=(50+5/3)*3/5+(70+7/4)*4/7+(90+9/5)*5/9
=50 *3/5+5/3 *3/5+70 *4/7+7/4 *4/7+90 *5/9+9/5 *5/9
=30+40+50+1*3
=123