The two numbers 1 are reciprocal. ( )

Two numbers whose product is 1 are reciprocal. ()

Xiaogang's walking distance from home to school is inversely proportional to the rest. ()

If the length of a rectangle is constant, the circumference is proportional to the width. ()

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(1) 10 is ()% larger than 8, and 8 is ()% smaller than 10.

(2) Drink 20% of a glass of milk, fill it with water, then drink 40%, and then fill it with water. At this time, the milk in the cup accounts for ()%.

(3) When A and B race, if A runs more distance and B spends more time than A, the speed ratio of A and B is ().

(4) If the ratio of a number to a number smaller than it by 4 is simplified, then this number is ().

The circumference of a square piece of paper is 24 square centimeters. What is the area of the largest circle cut on paper?

4. The sum of three natural numbers is 252, A: B = 2: 5, B: C = 4: 7. Find these three numbers.

5. The circumference of a rectangle is 96 cm, length: width = 5: 3. Find the area of this rectangle.

6. A grain store sold 420 kilograms of rice in June, 20% more than in May. How many kilograms of rice did it sell in May?

7. A grain store sold 420kg of rice in June, 20% less than that in May. How many kilograms of rice did it sell in May?

8. The distance between Party A and Party B is 360 kilometers, and two cars are driving in opposite directions from both parties at the same time. The speed of a car is 50 kilometers per hour, and the distance between the two cars is 48 kilometers after three hours. How many kilometers can another car travel per hour?

9. Xiaoming's average score in Chinese and English is 83, and mathematics is 6 points higher than Chinese, English and mathematics. What's Xiao Ming's math score?

10. There are three classes in Grade 6, one of which accounts for the whole grade, and the number of students in Class 3 is more than that in Class 2. If the number of students in Class 3 and Class 2 is equal, how many students are there in Grade 6?

Elementary school mistakes highlights answer:

1.( 1)×(2)√(3)×(4)×

2.( 1)25; 20(2)48(3)(4) 16

3. 18.84

4.a32； b80； C 140

5.540

6.350 kg

7.525 kg

8.54 km or 86 km

9.92 points

10. 136 people