优优班--学霸训练营 > 知识点挑题
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            • 1. 求未知数x.
              4
              5
              1
              6
              =x:
              1
              2
                         32:x=0.25:
              15
              8
                            x-45%x=2.2
              x-6×
              2
              3
              =2             x+
              2
              3
              x=
              9
              16
                                  
              1.5
              0.5
              =
              x
              3
            • 2. 解方程或比例.
              (1)
              1
              5
              ×
              1
              4
              +
              1
              4
              x=90      
              (2)x:15=
              2
              3
              5
              7
                  
              (3)0.5x-12.3=0.2.
            • 3. 求未知数x.
              x:
              3
              5
              =
              1
              3
              :3  0.4x-1.2=5.6   5x+0.75×4=6.5  
              3
              5
              x+
              1
              4
              x=34.
            • 4. 求未知数X.
              5
              4
              1
              4
              =X:
              8
              5
              ;                   2X-3.6=5.4.
            • 5. 解方程,写出计算过程.
              0.6:
              1
              2
              =x:
              4
              15
              ;                           
              5
              6
              x-30%=12.5.
            • 6. 解方程.
              4+0.7x=102                    
              1.8:x=7.2:0.8.
            • 7. 解方程或比例.
              1.4+0.7x=5.6                    
              x:
              5
              12
              =4.8:4.
            • 8. 求未知数x.
              x-0.8x-6=16;             
              20
              x
              =
              3
              5
              ÷3;           
              1
              4
              1
              8
              =x:
              1
              2
            • 9. 解下列方程或比例.
              5
              6
              4
              9
              =
              15
              x
              ;                      
              1
              2
              x+25%=10.
            • 10. 计算题.
              1
              12
              +(4
              5
              12
              -3
              1
              2
              )÷
              11
              24

              (8
              5
              8
              -10.5×
              4
              5
              )÷4
              1
              3

              2
              7
              20
              ÷[5
              3
              4
              -4.5×(20%+
              1
              3
              )]
              9
              2
              :x=2
              4
              7
              :0.5
              2
              5
              9
              +3
              9
              10
              -5.22
              2
              5
              9
              -6
              27
              50
              +5.22
              +(
              2006×0.4
              2008×0.5
              +
              16
              2008

              1
              1+2
              +
              1
              1+2+3
              +
              1
              1+2+3+4
              +…+
              1
              1+2+3+…+50
            0/40

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