优优班--学霸训练营 > 知识点挑题
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            • 1. (1)(7.2×7.5×5.4)÷(2.4×1.5×2.7);
              (2)1+3+5+7+…+2009;
              (3)解方程:
              2x+6.8
              5
              =
              x-3
              2

              (4)
              1
              2
              +
              3
              4
              +
              7
              8
              +
              15
              16
              +
              31
              32
              +
              63
              64
              +
              127
              128
              +
              255
              256
            • 2. 计算
              3.14×67+8.2×31.4-90×0.314              
              12.65÷12.5÷0.8          
              (32×0.63×0.95)÷(1.6×21×1.9)
            • 3. 计算:
              (1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)=
              66.6×7.6+334×0.24+13.36×38=
              998877+988776+887766+877665+776655+766554+665544+655443=
              (1×2×3×4×…×9×10×11)÷(28×27×25×24×22)=
              1.23452+0.76552+2.469×0.7655=
            • 4. 已知A=0.
              00…0
              2006个0
              96,B=0.
              00…0
              2007个0
              3,则A÷B=    
            • 5. 0.033+0.043+0.053+0.063+0.073+0.083+0.093+0.13
            • 6. 计算下面各题.
              (1)2.89×6.37+0.137×28.9+289×0.0226;  
              (2)1
              1
              2
              +2
              1
              4
              +3
              1
              8
              +4
              1
              16
              +5
              1
              32
              +6
              1
              64

              (3)
              2011+2012×2010
              2011×2012-1
              ;                  
              (4)(5
              2
              5
              -1.8)÷[(1.15+
              13
              20
              )×1
              2
              3
              ];
              (5)
              1
              1×2
              +
              2
              1×2×3
              +
              3
              1×2×3×4
              +…+
              8
              1×2×3×…×9
              (答案写成最简形式即可)
            • 7. 0.23+0.27+0.31+0.35+…+0.63+0.67.
            • 8. (1)[19.08+(3.2-0.299÷0.23)]×0.5
              (2)34.5×9.23-34.5+1.77×34.5
              (3)9999×9999×19999.
            • 9. 已知A=
              0•00…063
              2011个0
              ,B=
              0.00…03
              2010个0
              ,则A÷B=    
            • 10. 计算:
              (1)0.1+0.2+0.3+0.4+…+0.9+0.1+0.11+0.12+…+0.98+0.99
              (2)
              1
              2
              1+
              1
              2
              +
              1
              3
              (1+
              1
              2
              )×(1+
              1
              3
              )
              +…+
              1
              9
              (1+
              1
              2
              )×(1+
              1
              3
              )×…×(1+
              1
              9
              )
            0/40

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