要用简便运算计算要写过程,2/1+4/5乘5/4 6/1 乘(5-3/2) 8/7乘7+8/3
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![要用简便运算计算要写过程,2/1+4/5乘5/4 6/1 乘(5-3/2) 8/7乘7+8/3](/uploads/image/z/1737674-26-4.jpg?t=%E8%A6%81%E7%94%A8%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E8%AE%A1%E7%AE%97%E8%A6%81%E5%86%99%E8%BF%87%E7%A8%8B%2C2%2F1%2B4%2F5%E4%B9%985%2F4+6%2F1+%E4%B9%98%EF%BC%885-3%2F2%29+8%2F7%E4%B9%987%2B8%2F3)
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要用简便运算计算要写过程,2/1+4/5乘5/4 6/1 乘(5-3/2) 8/7乘7+8/3
要用简便运算计算要写过程,
2/1+4/5乘5/4 6/1 乘(5-3/2) 8/7乘7+8/3
要用简便运算计算要写过程,2/1+4/5乘5/4 6/1 乘(5-3/2) 8/7乘7+8/3
2/1+4/5乘5/4
=2+1
=3
6/1乘(5-3/2)
=6乘5-6乘3/2
=30-9
=21
8/7乘7+8/3
=8+8/3
=32/3
这个好像没有什么简便运算吧!2/1是二分之一的意思吗?应该写成1/2