用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
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![用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15](/uploads/image/z/183681-9-1.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97+2%2F5%C3%9716+101%C3%973%2F4--3%2F4+5%2F6%C3%9730%C3%977%2F15)
用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
用简便方法计算 2/5×16 101×3/4--3/4 5/6×30×7/15
2/5×16
=0.4×16
=6.4
101×3/4--3/4
=(101-1)×3/4
=100×3/4
=75
5/6×30×7/15
=5/6×14
=35/3