1. A five-digit 382 □□□□ can be divisible by 3, and the last two digits are at most 98. ()

2. Because 5/6 is greater than 4/5, the decimal unit of 5/6 is greater than 4/5. ( )

It is known that A can be divisible by 37, so A is 37. ()

4. Integer A is the factor of B, and the greatest common factor of A and B is A× B .. ()

5. Decimals and integers are the same, and the ratio between all adjacent counting units is 10. ()

6. Infinite decimals must be cyclic decimals. ( )

7.a+b=b+a is the equation ()

8. The ratio of radii of two circles is 4: 3, and the ratio of areas is 8: 6. ()

9.m divided by the quotient of n and a can write n/m+a. ()

10. A shirt costs one yuan, and the price of a sweater is more than twice that of 7 yuan. The price of this sweater is (2a+7) yuan. ()

Second, multiple choice questions

1. Add or delete zeros in (), and the size of decimal remains the same.

A. the end of a number

B. At the end of the decimal

C. After decimal point

2. Move the decimal point 0.0 1 two places to the right and then three places to the left. The original number is (). A. zoom in 10 times B. zoom out 10 times C. zoom out 100 times.

3.0.95 Keep two decimal places is (). A 0.95 B 0.96 C 0.950

4. The composite number must have at least (). A. One divisor B. Two divisors C. Three divisors A. Different products, different meanings B. Equal products, the same meaning C. Equal products, different meanings 5.4x+3 = 9 is (). A. Equation B. Equation C. Solution of Equation D. Solution of Equation

6. The prime factor of decomposition 18 is (). a . 18 = 2×9 b . 18 = 2×3×3 c . 18 = 1×2×3×3d . 2×3×3 = 18

7. They are both composite numbers and prime numbers, and their least common multiple is 120. These two numbers are (). A. 12 and 10 B.8 and 15 C.4 and 30 D.5 and 24.

8. Four digits (0, 2, 4, 6) can be divisible by ().

A.2 B.3 C.5

9. The composite number must have at least (). A. One divisor B. Two divisors C. Three divisors

Of the 20 numbers 10.3 1 1 ~ 20, the smallest sum of odd, even, composite and prime numbers is ().

A. 10

Third, the application problem.

1. grass 100 kg, water content 66%. After drying, the water content decreased to 65438 05%. How many kilograms do these grasses weigh after drying?

2. Reduce one side of the square by 1/5, and increase the other side by 4m to get a rectangle. This rectangle has the same area as the original square. So how many square meters is the square area?

3. A workshop processes A and B parts. Part a accounts for 30% of the processing part, and then 24 parts b are processed, at which time part a accounts for 25%. So how many two kinds of parts have been processed now?

4. Party A, Party B and Party C produce * * * 1760 pieces. If Party A produces 2/9 less and Party B produces 80 more, then the number of parts produced by Party A, Party B and Party C is equal. How much did A, B and C each produce?

Xiaoming's age this year is 65438+ 0/6 of his father's age. 15, his age is 4/9 of his father's age. How old are Xiaoming and his father this year?

6. There are 3 14 students in a school, of which 2/3 boys are 40 less than 4/5 girls. How many boys and girls are there in this school?

7. The number of students in Class A and Class B is equal, and some students in each class participate in the math group. The number of people in class A who participated in the math group was exactly1/3 of the number of people in class B who did not participate in the math group; The number of people who participated in the math group in Class B is exactly 0.4 of the number of people who did not participate in the math group in Class A+65438+A ... So, how many people who did not participate in the math group in Class A are from Class B?

8. Party A, Party B and Party C can finish copying a manuscript within 1 hour. If Party A and Party B copy together, it will take 80 minutes to complete; If B and C are copied together, it will take 100 minutes to complete. If this manuscript is copied by B alone, how many hours will it take to finish?

Fourth, fill in the blanks

A number consists of eight tens, five ones, three tenths and seven percent. This number is written as ().

2. An Audi car drives from Fuzhou to Xiamen at a speed of180km/h, and the one-hour journey is 45km away from Xiamen. The formula with letters indicates that it is () kilometers from Fuzhou to Xiamen, and Xiamen still needs to walk on the bridge lane for () hours.

3. A set of clothes ***90 yuan, the price ratio of coat and trousers is 5: 4, and it should cost () yuan to buy a pair of trousers.

4. A rectangular gift box, 8 cm long, 3 cm wide and 5 cm high. The maximum area of each side of this rectangle is (), and the minimum area is ().

5.2.06 square meters = () square meters () square decimeter

6. 2,000 students in Jiefang Primary School were absent from class for one day 10. The attendance rate that day was ().

7. A number 1/5 is 1/2, and 40% of it is ().

8.A: B = C, when () is constant, () and () are directly proportional to (),

9. Rewrite the line segment scale of 0,50, 100, 150km to the numerical scale ().

10. A liquid medicine, the mass ratio of pesticide to water is1:200,700 kg of water needs to be put with pesticide ().

1 1. There are three cars, A, B and C, and each car travels from the ground to the ground at a certain speed. B departs later than C 10 minute, and catches up with C 40 minutes after departure; A leaves 20 minutes later than B, and catches up with C at 1 hour 40. Then it will take _ _ _ minutes for A to catch up with B after departure.

I am a junior. Graduated from primary school for one year. I have done all these questions. Look at them. You really work hard! After the sixth grade summer vacation, there is almost no time to play! I have a deep understanding!