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            • 1. 简算
              ①75%×96+
              3
              4
              ×5-0.75
              ②7.2×58+72×4.2
              ③(
              1
              19
              +
              1
              23
              )×19×23
              2011
              2010
              ×2009+
              2011
              2010

              1
              2
              +
              1
              6
              +
              1
              12
              +
              1
              20
              +
              1
              30

              ⑥17.85-(6.5+7.85)
            • 2. 速算、巧算:
              (1)1+
              1
              2
              ×
              1
              3
              +
              1
              3
              ×
              1
              4
              +…+
              1
              2009
              ×
              1
              2010
              +
              1
              2011
              ×
              1
              2012

              (2)
              1
              2
              +
              1
              4
              +
              1
              8
              +
              1
              16
              +
              1
              32
              +…+
              1
              1024
              +
              1
              2048
              +
              1
              4096
            • 3. 计算:
              2×3×4+4×6×8+6×9×12
              1×2×3+2×4×6+3×6×9
                  
              1+
              1
              2
              +
              1
              4
              +
              1
              8
              +
              1
              16
              +
              1
              32
                           
               
              1988+1989×1987
              1988×1989-1

              1
              1
              3
              -
              7
              12
              +
              9
              20
              -
              11
              30
              +
              13
              42
              -
              15
              56
                             
              2356÷2356
              2356
              2357
                       
              0.125×
              3
              4
              +
              1
              8
              ×8.25
              +12.5%
              (1+
              3
              4
              )×(1-
              3
              4
              )×(1+
              3
              7
              )×(1-
              3
              7
              )×(1+
              3
              10
              )×(1-
              3
              10
              )…×(1+
              3
              100
              )×(1-
              3
              100

              0.
              4
              -0.0
              4
              -0.00
              4

              0.1
              1
              +0.1
              2
              +0.1
              3
              +0.1
              4
              +0.1
              5
              +0.1
              6
              +0.1
              7
              +0.1
              8
            • 4. 用简便方法计算:
              11
              10
              ×
              11
              10
              ×
              11
              10
              -
              11
              10
              ×
              11
              10
              -
              11
              10
              ×
              1
              10
            • 5. (1+
              1
              2
              )×(1-
              1
              2
              )×(1+
              1
              3
              )×(1-
              1
              3
              )×(1+
              1
              4
              )×(1-
              1
              4
              )×…×(1+
              1
              2004
              )×(1-
              1
              2004
            • 6. 计算:|
              1
              3
              -
              1
              2
              |+|
              1
              4
              -
              1
              3
              |+|
              1
              5
              -
              1
              4
              |+…+|
              1
              2008
              -
              1
              2007
              |
            • 7. 看图计算.
              1
              3
              +
              1
              6
              +
              1
              12
              +
              1
              24
              +
              1
              48
              +…=    
            • 8. 计算:
              1
              1×5
              +
              1
              5×9
              +
              1
              9×13
              +
              1
              13×17
              +…+
              1
              25×29
            • 9. 计算:(
              2009
              2010
              +
              2010
              2011
              +
              6
              7
              )(
              1
              2
              +
              2009
              2010
              +
              2010
              2011
              +
              2
              5
              )-(
              1
              2
              +
              2009
              2010
              +
              2010
              2011
              +
              6
              7
              )(
              2009
              2010
              +
              2010
              2011
              +
              2
              5
              ).
            • 10. 计算:
              3
              10
              -
              3
              100
              -
              3
              1000
              -…-
              3
              1000000
            0/40

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