Mathematics examination questions at the end of the eighth grade 1. Fill in the blanks (2 points for each small question, ***20 points) When1.x _ _ _ _ _ _ _, the score is meaningful; 2. Please fill in the appropriate content on the horizontal line below to make it a correct and complete fractional addition and subtraction operation _ _ _ _ _ _ =; 3. If a=, then the value of is equal to _ _ _ _ _. 4. If the image of the inverse proportional function passes through the point (1, -2), then the analytical formula of the inverse proportional function is _ _ _ _ _ _ _ _. 5. A set of data is known: -2, -2, 3,-1. Then the median of this set of data is _ _ _ _ _ _ _. 6. As shown in figure 1, p is a point of the inverse proportional function image in the second quadrant, and the area of the rectangular PEOF is 3. Then the expression of the inverse proportional function is _ _ _ _ _. (1) (2) (3) 7. As shown in Figure 2, e and f are two points on the diagonal BD of ABCD. Please add an appropriate condition: _ _ _ _ _ Make the quadrilateral AECF a parallelogram. 8. As shown in Figure 3, in the square ABCD, AB= 1, and point P is a point on the diagonal AC, and squares are made with AP and PC as diagonals respectively. Then the sum of the perimeters of two small squares is _ _ _ _ _ _ _. (4) (5) (6) 9. As shown in Figure 4, trapezoidal paper ABCD, ∠ B = 60, AD∨BC, AB=AD=2, BC=6. Fold the paper in half so that point B and point D overlap. If the crease is AE, CE = _ _ _ _ _ _. 10. As shown in Figure 5, it is a movable diamond-shaped clothes rack with a side length of 15cm. If the distance between nails on the wall is AB=BC= 15cm, then ∠ 1 = _. *** 15) 1 1. In a shooting practice, the first five shooting scores of A and B are (unit: ring) A:10810107b: 710. S2·S2· a