速求答复!①75×1/17+15/17×12②2×1/5+4×2/11+4×2/5+3×4/11新人悬赏不多只求答复
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 09:02:19
![速求答复!①75×1/17+15/17×12②2×1/5+4×2/11+4×2/5+3×4/11新人悬赏不多只求答复](/uploads/image/z/3726499-67-9.jpg?t=%E9%80%9F%E6%B1%82%E7%AD%94%E5%A4%8D%21%E2%91%A075%C3%971%2F17%2B15%2F17%C3%9712%E2%91%A12%C3%971%2F5%EF%BC%8B4%C3%972%2F11%EF%BC%8B4%C3%972%2F5%EF%BC%8B3%C3%974%2F11%E6%96%B0%E4%BA%BA%E6%82%AC%E8%B5%8F%E4%B8%8D%E5%A4%9A%E5%8F%AA%E6%B1%82%E7%AD%94%E5%A4%8D)
速求答复!①75×1/17+15/17×12②2×1/5+4×2/11+4×2/5+3×4/11新人悬赏不多只求答复
速求答复!
①75×1/17+15/17×12
②2×1/5+4×2/11+4×2/5+3×4/11
新人悬赏不多
只求答复
速求答复!①75×1/17+15/17×12②2×1/5+4×2/11+4×2/5+3×4/11新人悬赏不多只求答复
①75×1/17+15/17×12
=15/17×(5+12)
=15/17×17
=15
②2×1/5+4×2/11+4×2/5+3×4/11
=2/5×(1+4)+4/11×(2+3)
=2/5×5+4/11×5
=2+20/11
=3又9/11
75*1/17+15/17*12 = 15
(2)2*1/5+4*2/11+4*2/5+3*4/11 = 3.8181818181818
希望采纳
①75×1/17+15/17×12
=75/17+75/17×12/5
=75/17 *(1+ 12/5)
=75/17 *(17/5)
=15
②2×1/5+4×2/11+4×2/5+3×4/11
=2×1/5+2×4/5+4×2/11+6×2/11
=2×(1/5+4/5)+(4+6)×2/11
=2+20/11
=42/11
祝你学习进步,更上一层楼! (*^__^*)
(1)=(75+15×12)/17=(15×5+15×12)/17=(15×17)/17=15
(2)=(2+4×2)/5+(4×2+4×3)/11=2+(4×(2+3))/11=42/11=3又9/11
第二题怪怪的,是不是题目有问题,怎么不是整数
①75×1/17+15/17×12=75/17+180/17=255/17=15
②2×1/5+4×2/11+4×2/5+3×4/11=22/55+40/55+88/55+60/55=210/55=3+9/11