下列各题如何用简便算法计算(小学五年级)4.06X55X273.572÷0.47X1.259.52÷0.28÷0.174.72X0.32÷0.16
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下列各题如何用简便算法计算(小学五年级)4.06X55X273.572÷0.47X1.259.52÷0.28÷0.174.72X0.32÷0.16
下列各题如何用简便算法计算(小学五年级)
4.06X55X27
3.572÷0.47X1.25
9.52÷0.28÷0.17
4.72X0.32÷0.16
下列各题如何用简便算法计算(小学五年级)4.06X55X273.572÷0.47X1.259.52÷0.28÷0.174.72X0.32÷0.16
4.06X55X27
=20.3×(11×27)
=20.3×297
=20.3×(300-3)
=20.3×300-20.3×3
=6090-60.9
=6029.1
3.572÷0.47X1.25
=0.893÷0.47×(1.25×4)
=1.9×5
=9.5
9.52÷0.28÷0.17
=95200÷28÷17
=3400×17
=57800
4.72X0.32÷0.16
=4.72×(0.32÷0.16)
=4.72×2
=9.44
怎样用简便算法计算下列各题:12÷1.25、94÷0.25÷0.4,请说明基本原理=(12×8__)÷(1.25×8__) =(96)÷(10) =(9.6) 94÷0
①4.06X55X.27
=20.3×(11×27)
=20.3×297
=20.3×(300-3)
=20.3×300-20.3×3
=6090-60.9
=6029.1
②3.572÷0.47X1.25
=0.893÷0.47×(1.25×4)
=1.9×5
=9.5
③9.52÷0.28÷0.17
全部展开
①4.06X55X.27
=20.3×(11×27)
=20.3×297
=20.3×(300-3)
=20.3×300-20.3×3
=6090-60.9
=6029.1
②3.572÷0.47X1.25
=0.893÷0.47×(1.25×4)
=1.9×5
=9.5
③9.52÷0.28÷0.17
=95200÷28÷17
=3400×17
=57800
④4.72X0.32÷0.16
=4.72×(0.32÷0.16)
=4.72×2
=9.44
收起
6029.1 9.5 57800 9.44
①4.06X55X.27
=20.3×(11×27)
=20.3×297
=20.3×(300-3)
=20.3×300-20.3×3
=6090-60.9
=6029.1
②3.572÷0.47X1.25
=0.893÷0.47×(1.25×4)
=1.9×5
=9.5
③9.52÷0.28÷0.17
全部展开
①4.06X55X.27
=20.3×(11×27)
=20.3×297
=20.3×(300-3)
=20.3×300-20.3×3
=6090-60.9
=6029.1
②3.572÷0.47X1.25
=0.893÷0.47×(1.25×4)
=1.9×5
=9.5
③9.52÷0.28÷0.17
=95200÷28÷17
=3400×17
=57800
④4.72X0.32÷0.16
=4.72×(0.32÷0.16)
=4.72×2
=9.44
拆
收起