(2) The number of girls is 80% of the number of boys, and the number of boys is a fraction of the class?
(3) The length-width ratio of the rectangle is 4:3, with an area of 432 square centimeters and a circumference of () centimeters.
(4) Close to the fence, enclose a rectangular vegetable field with a bamboo fence with a length of 18m. What is the largest area of this vegetable field?
(5) If the length and width of a rectangle with a circumference of 46 decimeters increase by 10 cm, how much will the area increase?
(6) Divide a circle with a circumference of 628 cm into four parts with the same shape, and the circumference of each part is () cm.
(7) Fold a circular piece of paper in half for three times, and the measured curve length is 1.57 cm. Then, the diameter of the round paper is () cm.
(8) For one project, Party A and Party B have cooperated for 6 days, and it takes 3 days for Party A to do it alone, and 2 days for Party B to do it alone. How is Party B's work efficiency?
(9). Master Zhao is pasting tiles on a 4-square-meter wall, which was 3/4 in the morning. In the afternoon, he used the remaining 12 bricks to paste 3/4 square meters. How many bricks are still missing?
(10). The quotient of natural number A divided by natural number B is 18, the greatest common factor of A and B is (), and the least common multiple is ().
(1 1). The sum of the minuend, subtraction and difference is 270, and the minuend is (). If the difference is 2/3 of the subtraction, then the subtraction is ().