First, observe carefully, and I'll calculate. (30%) 1. Write the number directly. (8 points)100-89 =1.25× 4 = 7.5+() =10 ()× () =13/8+5/8 = 4/9 ÷. (4 points) 5x-3.5 = 84 ∶ x = 3 ∶ 123. Calculate by recursive equation (if it can be simplified, calculate by simple method). (13 points) ①13× 8×125 ② 8.9× 99+1× 99 ③12 ÷ (4.3× 2-7.4 (2 points) (unit 5. Calculate the volume (unit: cm) of the cone shown in the figure below for 3 minutes d = 4；; H=6 seconds. Think about it. I'll fill it out. (2 1%) (1) The equatorial circumference of the earth is 4,075.69 kilometers, and the number written on the horizontal line is: (2) 84,000,000 is rewritten as "1 billion", and the number is () 1 billion. (3) 3 kg 800g = () g 85000ml = () L (4) Divide the 3m-long iron wire into five segments, each segment is () m long. (5) A =2×3×5, B =3×5×7, and the greatest common divisor of two numbers is (). (6) () ÷ 24 = ()% = 24: () = () (decimal) (7) 0.57÷0.06. When the quotient is an integer 9, the remainder is (). (8) 8 is 5 () %32 is greater than 20 ()%. (9) x/5 = y, and x and y are directly proportional (). A (10) graph has () symmetry axes. (11) The mascots of the 2008 Beijing Olympic Games are "Fuwa" (Beibei, Jingjing, Huanhuan, Yingying and Nini), one yuan each, and it costs () yuan to buy a set. (12) On a large-scale map, 1cm represents the actual distance () km. (13) Mr. Wang bought the State Construction Bond of 1500 yuan with a fixed term of 3 years. If the annual interest rate is 3%, he can get the principal and interest of 1 * * () RMB at maturity. (14) The area in Figure 3 on the right occupies the area of the puzzle. (15) Look at the following set of numbers, find out the rules, and fill in the letters in brackets. Third, distinguish right from wrong, and I will judge. (4%) (√ in brackets means right, and x means wrong) 1.0.33838 is a cyclic decimal. ..... () 2. 12/ 15 cannot be converted into a finite decimal. ..... () 3. My height is between 1 and 2 meters. ..... () 4. From 3: 00 to 3: 10, the minute hand on the clock turned 60 () 4. I will choose carefully. (4%) (choose the serial number of the correct answer and fill in the brackets) 1. The two numbers that become prime numbers must be (). ① Only the common divisor 1 ② is a prime number ③ There is no common divisor 2. As shown on the right, fold a square piece of paper in half along the dotted line, then fold it in half, make a hole in the middle, and then unfold it. The expanded graph is (). 1233. The sun is shining brightly in Changting at noon today. After 12, the weather in Changting will be (). The sun is still shining; (2) there can be no sun; ③ Not sure whether there is a sun; 4. The label on the medicine bottle reads "0.2mg (mg) ×60 capsules per bottle; Usage and dosage: 0.4mg "three times a day, 5 days as a course of treatment. A bottle of medicine can be used for () course of treatment. 1 1 22 33 5. I can draw skillfully. (8 points) (The side length of each small square in the picture on the right is 1 cm) ① Draw a triangle you like according to the line segments in the picture. (2) This triangle is a triangle. The area of this triangle is () square centimeters. (4) Draw a parallelogram in the drawing, so that the area of the parallelogram is twice that of the triangle. 6. I can solve this problem. (33%) 1, only the comprehensive formula does not count. (10) ① A pile of coal used 25 tons, and the rest was 6 tons more than used. How many tons are left? ② Datong Village planned to plant 1 1,000 plants in March, but actually planted 1 1,250 plants. How many percent more trees were actually planted than planned? (3) For a job, A does it alone for 6 hours, and B does it alone for 4 hours. After A finishes 1/3, how many hours will they need to cooperate? The naughty family raised 25 rabbits this year, eight fewer than last year's three times. How many rabbits were raised last year? 2. Answer the following questions continuously. (23 points) ① Plow a field with a tractor, and it took 45 minutes to plow 1 1/6 hectares, which is equivalent to 1 1/2 1 of the total area of this field. How many hectares is this land? ② Changting Anta Garment Factory plans to make 660 sets of clothes, which has been done for 5 days, with an average of 75 sets per day. The rest will take three days to finish. How many sets do you have to make every day on average? (3) Car A travels from place A to place B at a speed of 70km/h and takes 5 hours to arrive. If it takes 4 hours to get there, how many kilometers do you need to drive per hour? (Solved in proportion) ④ Several big pillars of nanzenji Daxiong Hall need painting. The circumference of the column bottom is 2.5 meters and the height is 5.2 meters. According to 1 kg paint, you can draw 5 square meters. How many kilograms of paint does it take to draw a big cylinder? ⑤ The following is the statistics of water and electricity consumption in Mao Mao in the first quarter of this year: 65438+1 October1February1March1April1water meter reading (ton). 90110135165 electricity meter reading (kWh) 180 230 275 330 (Note: if you want to calculate the monthly water and electricity consumption of 65438+ 10, you must A. If the water fee per ton is 1.8 yuan, how much will it cost in February? B. If the electricity bill for June 5438+ 10 is 25 yuan, what is the unit price of the electricity bill? Please ask a math question and answer it.