优优班--学霸训练营 > 知识点挑题
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            • 1. 探索规律
              1
              1×2
              +
              1
              2×3
              =
              1
              1×2
              +
              1
              2×3
              +
              1
              3×4
              =
              1
              1×2
              +
              1
              2×3
              +
              1
              3×4
              +
              1
              4×5
              =
              1
              1×2
              +
              1
              2×3
              +
              1
              3×4
              +
              1
              4×5
              +…+
              1
              1999×2000
              =
            • 2. 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)
            • 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.
              0.00…0.15
              9个0
              ÷
              0.00…0.3
              9个0
              =    
            • 5. 计算
              0.8×2.7×12.5=
              35.6÷2.5÷0.4=
              (16.8+1.47)÷0.7=
              2+4+6+8+…+2002=
              3.42×76.3+76.3×5.76+9.18×23.7=
            • 6. 在横线里填写合适的数
              111+112+113+114+115+116+117+118+119
              =    ×9
              =    
            • 7. 计算题.
              ①34+27+29+30+33+31                      
              ②1439-(439-187)
              ③401×25                                 
              ④87×28+28×13
              ⑤规定a△b=a×3-b×2. 计算:(5△6)△4.
            • 8.
              1
              21
              +
              202
              2121
              +
              50505
              212121
              +
              13131313
              21212121
              =    
            • 9.
              1
              2
              +
              1
              4
              +
              1
              8
              +
              1
              16
              +
              1
              32
              +
              1
              64
              +
              1
              128
            0/40

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