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            • 1. 下面各题怎样计算简便就怎样算.
              (1)
              7
              18
              ×
              9
              15
              ×
              3
              14
                    
              (2)
              9
              10
              ×11-
              9
              10
                      
              (3)
              7
              13
              ×
              3
              5
              +
              7
              13
              ×
              2
              5

              (4)11×(
              2
              11
              -
              1
              12
              )×12        
              (5)
              1
              2×4
              +
              1
              4×6
              +
              1
              6×8
              +…+
              1
              2012×2014

              (6)1-
              1
              2
              -
              1
              4
              -
              1
              8
              -
              1
              16
              -
              1
              32
              -
              1
              64
              -
              1
              128
              -
              1
              256
            • 2. 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
            • 3. 脱式计算(能简算的要简算).
              [1.9+19%×(4.8-3
              4
              5
              )]÷(53
              1
              4
              +30.6×0.25);
              9÷1+5.46÷2×(4.875-2);
              59
              1
              7
              ×
              7
              6
              +49
              1
              6
              ×
              6
              5
              +39
              1
              5
              ×
              5
              4
              +29
              1
              4
              ×
              4
              3
              +19
              1
              3
              ×
              3
              2
            • 4. 怎样简便怎样算.
              (1)166
              1
              20
              ×
              1
              41
                                          
              (2)[1-(
              1
              5
              +
              3
              10
              )]÷
              1
              14

              (3)
              1
              5×8
              +
              1
              8×11
              …+
              1
              17×20
                            
              (4)
              5
              6
              ×
              1
              13
              +
              5
              9
              ×
              2
              13
              +
              5
              18
              ×
              6
              13
            • 5.
              1
              1994
              +
              2
              1994
              +
              3
              1994
              +…+
              1993
              1994
              +
              1994
              1994
              =
            • 6. 简算:
              1
              2
              +
              1
              6
              +
              1
              12
              +
              1
              20
              +
              1
              30
              +
              1
              42
              +
              1
              56
            • 7.
              7.4×
              5
              4
              +125%+1.25÷10=
              1998÷1998
              1998
              1999
              =
            • 8. 神机妙算细又巧
              24×(
              1
              4
              +
              1
              8
              +
              1
              6
              9.56-4.875+
              1
              8
              +1.44
              7
              12
              ×0.86+14%÷
              12
              7
              1
              128
              +
              1
              64
              +
              1
              32
              +…+
              1
              4
            • 9.
              1
              1×2
              +
              1
              2×3
              +
              1
              3×4
              +
              +
              1
              98×99
              +
              1
              99×100
            • 10. 如果
              1
              97
              +
              3
              97
              =
              2
              97
              ×2=
              4
              97
              1
              97
              +
              3
              97
              +
              5
              97
              =
              3
              97
              ×3=
              9
              97
              1
              97
              +
              3
              97
              +
              5
              97
              +
              7
              97
              =
              4
              97
              ×4=
              16
              97
              ,则
              1
              97
              +
              3
              97
              +
              5
              97
              +…+
              49
              97
              =(  )
              A.
              625
              97
              B.
              676
              97
              C.
              1225
              97
              D.
              2401
              97
            0/40

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