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            • 1. 巧算.
              48
              3
              10
              ÷23
              ( 
              1
              3
              -
              1
              5
              )+(
              1
              3
              -
              1
              5
              )+…+(
              1
              3
              -
              1
              5
              )(n项)
            • 2. 简便运算:
              5.2×
              1
              4
              +1.8×0.25+25%;     
              (2013×2014+2714)÷(2014×2015-1314);
              1
              2×5
              +
              1
              5×8
              +
              1
              8×11
              +
              1
              11×14
              +
              1
              14×17
              +
              1
              17×20
                           
              2014÷2014
              2014
              2015
            • 3.
              5
              2093
              -
              5
              3059
              -
              1
              1729
            • 4. (1)(
              1
              2
              +
              1
              3
              +
              1
              5
              )÷
              1
              30
              +(
              1
              3
              +
              1
              5
              +
              1
              7
              )÷
              1
              105

              (2)2014×(1+0.5)×(1+
              1
              3
              )×(1+0.25)×…×(1+
              1
              99
              );
              (3)
              3(y+1)
              5
              =
              4(y+3)
              7
            • 5. 计算题
              (1)4.85÷
              5
              18
              -3.6+6.15×3
              3
              5
                            
              (2)3-17.5%×[5
              1
              5
              ÷(3.25×
              7
              8
              )]
              (3)(1+
              1
              2
              )×(1+
              1
              4
              )×(1+
              1
              6
              )×(1+
              1
              8
              )×(1-
              1
              3
              )×(1-
              1
              5
              )×(1-
              1
              7

              (4)(
              1
              2
              +
              1
              3
              +
              1
              4
              +
              1
              9
              )×36                
              (5)已知
              x-3.6
              4
              =
              x+4.8
              8
              ,求x
              (6)
              1
              2007
              +
              3
              2007
              +
              5
              2007
              +
              7
              2007
              +
              9
              2007
              +…+
              2005
              2007
              +1
              (7)
              1
              12
              +
              1
              20
              +
              1
              30
              +
              1
              42
              +
              1
              56
              +…+
              1
              210
            • 6. 计算,怎样简便怎样算
              7
              12
              ×
              3
              8
              +
              7
              12
              ×
              5
              8
              5
              7
              ×
              3
              4
              ×
              2
              5
              5
              11
              -
              1
              8
              )×88
              58×
              3
              7
              +12÷2
              1
              3
              67×
              31
              33
              1
              4
              ÷(3-
              8
              11
              -
              3
              11
              1
              20
              +
              1
              30
              +
              1
              42
              11
              32
              +
              11
              56
              987×655-321
              666+987×654
            • 7. 脱式计算.(能简算的要简算)
              18.75×3.8-8.75×3.8    
              5
              9
              -(
              5
              9
              -
              2
              5
              )+
              3
              5
                
               (
              5
              6
              -
              1
              4
              )×
              3
              49
              ÷
              3
              4
              1
              20
              +
              1
              30
              +
              1
              42
              +
              1
              56
              +…+
              1
              132
            • 8. 计算题.
              (1)13
              4
              19
              +86
              15
              19
              ×0.25+0.625×86
              15
              19
              +0.125×86
              15
              19

              (2)
              1
              2
              +
              1
              22
              +
              1
              23
              +
              1
              24
              +…+
              1
              211

              (3)
              2×2
              1×3
              +
              4×4
              3×5
              +
              6×6
              5×7
              +
              8×8
              7×9
              +
              10×10
              9×11

              (4)
              12+22
              1×2
              +
              22+32
              2×3
              +
              32+42
              3×4
              +…+
              20002+20012
              2000×2001
            • 9. 下列各题怎样简便就怎样计算
              (1)
              7
              5
              -
              2
              5
              ÷715-
              1
              7
              ;  
              (2)(50×49×48)÷(16×15×14);
              (3)4.06×125%+7.36÷
              4
              5
              -0.142×12.5;  
              (4)
              1
              2
              +
              1
              5
              +
              1
              8
              +
              1
              11
              +
              1
              20
              +
              1
              40
              +
              1
              110
            • 10. 脱式计算.
              (1)[(7.6-5.2)÷0.4+2.54]×3.2;             
              (2)0.125×
              1
              4
              +1.875÷4;
              (3)(
              1
              2
              -
              1
              5
              -
              1
              6
              )×30;                      
              (4)97×
              59
              96

              (5)
              1
              2
              +
              1
              6
              +
              1
              12
              +
              1
              20
              +
              1
              30
              +
              1
              42
              +
              1
              56
              +
              1
              72
              ;          
              (6)2222×4444+8888×8889.
            0/40

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