1 10+56? (37-38) 53? 3 10? 56+ 16

12.5? 0.32? 25 37? ( 1 16+23)? 3 10

3. Solve the equation.

x2 1 = 49 : 16 80%x-0.4？ 1.2= 1.2 9:4=4.5: x

Fill in the blanks.

1. A number consists of 700 million, 9 million, 5 million, 700 and 21. This number is written as () and rewritten as? Wan? The unit number is (), and the mantissa after omitting 100 million is ().

2.80 kg minus ()% is 50 kg; 15 is 60kg more than ().

Distribute three cakes to seven children equally, and each child will get () pieces.

4. A part is 5 mm long and drawn on the drawing. This part is 15cm long, and the scale of this drawing is ().

5. When 1200ml = () cubic decimeter 45min = ()

6. Among 13, 33.3%, 3 10 and 3.3, the largest is (), and the smallest is ().

7. 16 hour car fuel consumption 3 10 liter engine oil, 1 liter engine oil can be used for () hours. 1 hour fuel consumption () liters.

The ratio of 8.35cm: 0.4m is (), and the simplified ratio is ().

9. The circumference of a square piece of paper is 12 decimeter. If you cut it into the largest circle, the circumference of this circle is () decimeter.

10.25 balls are arranged in a row as shown in the figure, and 18 ball is () ball; There are () black balls.

1 1. A string number is 1, 1, 2, 2, 3, 4, 4, 5, 5. Starting from the first number on the left, the 35th number is (), and there are () odd numbers in the first 35 numbers.

12. For a project, it takes 10 day for Party A's independent maintenance and 15 day for Party B's independent maintenance. The two teams worked together for 3 days and completed this project ().

13. It takes 12 minutes to saw a piece of wood into 4 sections, and () minutes if it is sawed into 8 sections.

Third, choose one. (Choose the serial number of the correct answer and fill in the brackets)

1. In the figure below, you can get a cylinder () by rotating it around a straight line.

A B C D

2. Put 1g salt into 10g water, and the ratio of salt to brine is ().

a . 1:99 b . 1: 100 c . 1: 10 1d . 100: 10 1

3. Bookstore 50 yuan sold two different sets of books, one made a profit of 10%, the other lost 10%, and the bookstore was ().

A. Lose money B. Make money C. Don't lose money or make money

4. Compared with the former item, it is expanded by 3 times, and the latter item is reduced to 13, with a ratio of ().

A. expand by 3 times B. expand by 9 times C. shrink by 3 times D. unchanged

There are two red balls and two white balls in a sealed and opaque bag. Lulu reached out and grabbed 1 ball at will. The possibility of catching the red ball is ().

12 b . 13 c . 14d . 16

Fourth, sentence.

1. One of the five consecutive natural numbers must be a multiple of 5. ( )

2. If the number A is less than the number B 13, then the number A is 23 ... () of the number B.

3. Enlarge a rectangle with a length of 5cm and a width of 3cm by 2: 1, and the graphic area is 30cm. ( )

The average water depth of swimming pool 1.5m, and Xiaohua's height 1.52m can definitely exceed the water depth. ( )

A cylindrical lead block is cast into a cone, and its volume remains unchanged. ( )

Fifth, draw a picture.

First, rotate the triangle 90 clockwise around point C? , and then translate the rotated triangle four squares to the right.

A

B.C.

Sixth, solve the problem.

1. The sportswear factory signed a production contract with the school for 2,400 sets of school uniforms, and completed 20% in the first three days. According to this calculation, how many days will it take to complete this task?

2. In order to prepare for Children's Day on June 1st, Xiaohong and Xiaoming folded 140 paper cranes.

How many paper cranes did Xiaohong and Xiaoming each fold?

3. Xiaohong read a story book and read 54 pages in 3 days. According to this calculation, how many days will it take to finish the book with 162 pages? (Use proportional solution)

4. Xiaoling height 135 cm. Xiao Qiang is taller than Xiaoling. How many centimeters is Xiao Qiang taller than Xiaoling?

The quality of a barrel of gasoline is 8% of that of gasoline. After pouring out 48kg of gasoline, the quality of oil is equal to half of the barrel. How many kilograms do oil drums and gasoline weigh?

6. Cast a cuboid iron block with a length of 9 cm, a width of 7 cm and a height of 3 cm and a cubic iron block with a side length of 5 cm into a cylinder. The diameter of the bottom of the cylinder is 20 cm, and the height is how many cm?