要用简便运算计算要写过程,
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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
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
=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