用简便方法计算
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2001/2012×2013=2001/2012×2012+2001/2012=1+2001/2012
7/11÷62.5%+4/11×8/5
=(7/11+4/11)×8/5
=8/5
6502+672÷28×17
=6502+23×17
=6502+391
=6893
2.2×3.83+2.2×5.17+2.2
=2.2×(3.83+5.17+1)
=22
1/6×5/3
=5/18
7/11÷62.5%+4/11×8/5
=(7/11+4/11)×8/5
=8/5
6502+672÷28×17
=6502+23×17
=6502+391
=6893
2.2×3.83+2.2×5.17+2.2
=2.2×(3.83+5.17+1)
=22
1/6×5/3
=5/18
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