Test 1 1. Fill in the blanks. (18) 1, 1 inclusive () 1/4 and () 1%. 2, 25 minutes = () hours 3.04 tons = () tons () kilograms. Two fifths of a bag of rice is exactly 30 kilograms, and this bag of rice weighs () kilograms. 4. A number 1/5 is equal to 60% of 30, and this number is (). 5,4/5 ÷ 2/3 = ()/() = (): 50 6.2: 0.25 The simplest integer ratio is (), and its ratio is (). 7. There are 90 students in the sixth grade, and the ratio of male to female is 5: 4. There are () male students and () female students. 8. Circle a wire with a length of 6.28 decimeters into the largest circle with an area of () square decimeters. 9, 7/8+4/5× 8/9 ÷ 3/4 This formula contains () level operation, so the () level operation should be calculated first. Second, the judgment question. (Tick "√" in brackets means right, tick "×" means wrong, ***5 points) 1, a number divided by 1/6 is to enlarge this number by 6 times. () 4/5 of 2,3/4 tons and 75% of 800 kilograms. () 3. For a commodity, first reduce the price by 10%, then increase the price by 10%, and the commodity price will remain unchanged. () 4. The perimeters of two circles are equal, and the areas must be equal. () 5. 1 kg nail used 1/5, and used 1/5 kg again, and used 40% kg twice. () Third, multiple-choice questions. (Fill in the serial number of the correct answer in brackets, 10) 1, the current cost is lower than the original cost 15%, and the current cost is the original (). ①15% ② 85% ③115% ② The following statement is true (). ① The reciprocal of the true score is not necessarily greater than the true score; ② The reciprocal of any integer is less than the original number; ③ There is only zero in natural numbers without reciprocal; And the figure with only one axis of symmetry is (). ① Square ② Isosceles Triangle ③ Circle 4. The radius of the circle is enlarged 3 times, and the area is enlarged () times. ① 3 ② 6 ③ 9