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            • 1. 计算:
              28×1111+9999×8                   67×0.25+2.5×3.75-4.5×0.25
              15.6×78-15.6×14-64×15.6        1÷1999+2÷1999+3÷1999+…+1998÷1999.
            • 2. 计算及解方程:
              (6.6×7.5×4.8)÷(2.4×3.3×2.5)
              3.875×0.2+38.75×0.09-0.3875
              (9999×19+3333×97-6666×71)÷6-1997            
              3(x-2)-1=15-2(x+2)
              6(3x-1)=21-4(3-4x)       
              5x-(13-7x )=10x+13        
              15x-3(25-2x)=30.
            • 3. 计算
              (1
              5
              7
              ×
              7
              12
              +
              6
              3
              4
              1
              2
              +
              1
              4
              )÷(1-
              1
              11
              );         
               2222×0.29+6666×0.09-3333×0.04;
              1
              2
              +(
              1
              3
              +
              2
              3
              )+(
              3
              4
              +
              2
              4
              +
              1
              4
              )+…+(
              19
              20
              +
              18
              20
              +…+
              1
              20
            • 4. 脱式计算
              41.2×9.2+412×0.08                     2001
              1
              1999
              ×
              1
              2000

              1
              1
              2
              +2
              1
              6
              +3
              1
              12
              +…+10
              1
              110
                                  (1
              1
              4
              -
              3
              8
              )÷(2
              2
              5
              +2
              1
              4
              ×
              1
              3
            • 5. 写出计算过程并得出结果.
              (1)
              26
              2
              9
              ×48-24
              5
              9
              ×48
              1
              2
              3
              ×1.4+4
              3
              5
              ×1
              2
              3
              -0.73-2
              27
              100

              (2)1×2+2×3+3×4+…+99×100.
            • 6. 怎样简便怎样算
              1000+999-998-997+996+995-994-993+992…+103-102-101+100
              9999×7+1111×37                      
              10101
              131313
              ×91.
            • 7. 计算:
              6775×6775-(6775-1)×(6775+1)=
              137×(1-
              1
              1998
              )=
            • 8. 怎么简便就怎么算.
              5.48+8.73+4.52+1.27       9.7÷1.25÷0.8         
              0.4×1.25×25×817.5-4.25-5.75              
              0.125×0.25×32       (6.3-6.3×0.9)÷6.3
              105×13-1890÷18           18×25%+60+42×0.25     
              0.4×125×25×0.89123-(123+8.8)
              1.24×8.3+8.3×1.76                9999×1001
              14.8×6.3-6.3×6.5+8.3×3.7              3.2×42.3×3.75-12.5×0.423×16
              4821-998                9048÷26                     
              2881÷431.8+18÷1.5-0.5×0.3                     
              6.5×8+3.5×8-47
            • 9. (1)0.625×50+0.625×3.46+5.346×3.75;
              (2)189
              1
              191
              ×(2-
              189
              190
            • 10.
              递等式计算,能巧算的要巧算.
              (80×46+80×54)÷25×4       

              14500÷125      

              36-36÷[150÷(50-25)]
              101×1001-1001           125×56×25          132×125-125×100
            0/40

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