1, the calculation formula of cone volume ().

2. The commonly used statistical charts are (), () and ().

3. Two expressions with equal ratios are called ().

4, 8 cubic decimeters = () liters = () milliliters;

3.6 square meters = () square decimeter

58050mg = () L = cubic decimeter.

1.05m3 = () cubic decimeter

6、34 =6( ) =( ) 12 =3×44×( ) = 15÷( )20÷5

7, 68% discount is ()%

8. The fruit output of Mentou Town this year has increased by 20% compared with last year, which means that it has increased by ()%.

9. Discount means (), which means () percent discount.

10, 10% is 10 (), and the percentage is ().

1 1, 45% is ten (), and if it is rewritten as a percentage, it is ().

12, Xiaoming bought a book, the original price was 2.85 yuan, the bookstore sold it to Xiaoming at a 20% discount, and Xiaoming paid () yuan.

Second, choose the serial number of the correct answer and fill it in brackets.

(1) The output of watermelon in Hongxing Township this year increased by 18% compared with last year, that is, the output increased ().

① 180% ② 180% ③ 0. 180%.

(2) The area of the following three plane figures () is 25 square decimeters.

(1) A triangle with a base height of 5 decimeters;

② A square with a side length of 50 cm;

③ The upper bottom is 2 decimeters, the lower bottom is 3 decimeters, and the height is 5 decimeters.

(3) The number of boys in a class accounts for 60% of the class, and the ratio of the number of girls to the number of boys in this class is ()

① 3∶ 5 ② 3 ∶ 2 ③ 2 ∶ 3