1.= () (decimal) = ()%

The reciprocal of 2. 5 is (), 0.4 and () are reciprocal.

3. fill in ">", "

× ○ × 1○ ÷ 1 ÷ ○

4. A barrel of beer poured out, just poured out 12kg. This barrel of beer used to weigh 100 kg.

A box of grapes weighs 28 kilograms. After eating, there are () kilograms left.

6. In order to celebrate the Olympic Games, the experimental primary school drew a 100-meter scroll, in which the sixth grade drew the whole length. The sixth grade drew a picture of () meters.

7. For a triangle, the ratio of degrees of three internal angles is 2: 3: 5. This is a () triangle. 8.6: 0.25 The simplest integer ratio is (), and the ratio is ().

9. A car completed the whole journey in 4 hours. The speed of the car is 45 kilometers per hour, and the whole journey takes () kilometers and () hours.

10. Xiaoming drew a circle with a compass with a diameter of 4 cm. When drawing a circle, the distance between the two feet of the compass is () cm, and the circumference of the circle is () cm.

1 1. I hope there are 12 students in the art interest group in Class One, Grade Six. The height (cm) of this 12 student is:

154 156 158 165 158 148 158 15 1 150 162 163 149

The median of this set of data is (), and the mode is ().

12. The sixth-grade students of Qianjin Primary School took a math exam, 97 passed and 3 failed, with a passing rate of ().

13. Draw the largest circle in a square with a side length of 20 cm. The area of this circle is () square centimeters.

14. There are 20 red and yellow balls of the same size in the box. In order to make it possible to touch the red ball, there should be () red balls and () yellow balls in the box.

Second, choose carefully.

1. In the school health inspection, 18 class was rated as "excellent", Class 2 as "good", and the excellent rate was ().

A.b . 9 1 c . 100

2. In the following formula, () is the largest.

A.× 15 b . 15 \c . 15×

3. Form a right triangle with 90 cm long iron wire, and the ratio of the lengths of the three sides of the triangle is 2: 3: 4. The area of this right triangle is () square centimeters.

A. 400 BC to 600 BC

4. Two circular pieces of paper with different sizes, the perimeter ratio is 2∶3. The area ratio of these two round pieces of paper is ()

A.2∶3 B. 4∶6 C. 4∶9

There are 80 boys in grade six in bright primary school, and there are more girls than boys. There are () students in Grade One, Grade Six, Yucai Primary School.

A.96 B. 144 C. 176

6. Mark the numbers on the six faces of a cube, so that the possibility of "2" facing up after throwing the cube is. The numbers on the six faces of the cube are () respectively.

A. 1 2 3 4 5 6

B. 1 1 1 2 2 2

C. 1 1 2 2 3 3

Third, judge carefully.

1. Because × 1.5= 1, it is the reciprocal of 1.5. ( )

2.A number is B number, that is, A number is 20% of B number. ( )

Add 12 to the former 3.4: 7, and multiply the latter by 4 to keep the proportion unchanged. ( )

4. Putting 20g sugar in 100g water is sweeter than putting 15g sugar in 30g water. ( )

5. The quotient of two true fractions must be a true fraction. ( )

Fourth, calculate the ring ratio.

1. Write the number directly.

6÷ = ×36= ÷ = ××30=

× = ÷ 2 = 18× = ( + )×24=

÷= 20×25%= 0÷ = ×÷=

2. Calculate the following questions reasonably and flexibly.

× ÷ × + × 2.8×( + )

( - ÷ ) × × + ÷ +

3. Solve the equation.

x+ x=35 7x- =

5. Look at the picture and list the formulas or equations and answer them.

Sixth, solve the problem.

1. The round flower bed is 20m in diameter, and a guardrail is placed around the flower bed. How long is the guardrail? How many square meters is this flower stand?

2. The Red Cross Society in a certain area received 300,000 yuan for disaster relief. Among them, the total amount was received in the first week, and the amount of donations received in the first week was the second week. How much did you receive in the second week?

Xiaohong read a story book. On the first day, she read 45 pages the next day, leaving 15 pages unread. How many pages are there in this book?

There are 240 paintings.

There are more paper-cut works than paintings.

Painting is less than calligraphy.

In order to welcome New Year's Day, the school held an art exhibition.

(1) How many paper-cut works are there?

(2) How many calligraphy works are there?

Xinxin Primary School has a round flower bed with a diameter of 8 meters. In order to beautify the campus, the flower bed was expanded, and the ratio of the diameter of the expanded flower bed to the original diameter was 3: 2. What is the area of the flower bed after expansion?

Reference answer

One, 23 points.

1.0.875 87.5 2. (or 2.5) 3. >; = & gt4. 18 5.2 1 6.40

7. Right angle 8.24:124 9.30010.212.561.153158.

12.97% 13.3 14 14. 12 8

Two, six points.

1.A 2。 C 3。 B 4。 C 5。 C 6。 B

Three, five points.

1.√ 2.√ 3.√ 4.× 5.×

Four, 33 points.

1. 12 points.

2. 15. 3 points for each question.

3.6 points. 3 points for each question.

Fifty-fifty points. Only those who list the formula get 2 points.

12000 ÷ (1+) =10000 (yuan)

Six twenty-eight. (For each of the following questions, the check formula is only half of the questions, and 0.5 points will be deducted for missing or misspelling the unit name or answer. )

1.8 points. 62.8 m314 m2

2.4.30×= 16 (ten thousand yuan)

3.4 points (45+15) ÷ (1-) =100 (page)

4.8.( 1)330 (2)336.

5.4. 1 13.04 m2