1—5/ 1 1 = 3/4 +3/4 = 2/7 —2/7 = 1— 6/ 13 =

7/ 12 + 1/6 = 4/5 — 1/5 = 1/4 +3/4 = 1/3 +3/8 =

2, careful calculation (6 points)

7/9 —2/3 +2/9 12/ + 1/3 + 1/4 15 +3/8 +4/5

4/7 +2/9 —4/7 1— 1/6 —5/6 1/5 +3/8 +4/5

3. Circle the simplest score and divide the rest into the simplest scores. (6 points)

16/ 18 63/90 12/ 16 7/ 18 5/ 13 6/30

3, solve the equation (18 points)

x—5/6 = 1/9 1/2+x = 5/6 12x—9x = 8.7

2x+ 1 = 5 3x—x = 0.9 x—34 = 1 12

Second, I can fill it out. (14)

The factors of 1 and 16 are (), 24 is () and 38 is (). The greatest common factor of 16 and 24 is (), that of 24 and 38 is (), and that of 16 and 38 is ().

2.45, 9 and 5, () is a factor of (), and () is a multiple of ().

3. The greatest common factor of15 and 9 is (), and the smallest common multiple is ().

There is a two-digit number 5□. If it is a multiple of 5, □ can be filled with (). If it is a multiple of 3, □ can be filled with (); If it is a multiple of 2 and 5 at the same time, □ can be filled with ().

5. In the natural number 1~ 10, the prime number has () and the composite number has ().

6. The simplest true fraction with denominator of 8 is (), and their sum is ().

7. 158 contains () 18. If () 18 is subtracted, its value is 12.

8. Divide the 3-meter-long rope into 5 parts on average, each part accounts for () of the total length, and each part is () meters long.

9. The parallelogram has a base of 5cm, a height of 4cm, an area of (), and an area of a triangle with equal base and equal height of ().

10. There are 8 red balls and 4 yellow balls of the same size in the pocket. You can randomly draw 1 ball. The possibility of drawing the red ball is (), the possibility of drawing the yellow ball is (), and the possibility of drawing the ball is the greatest.

First, fill in the blanks. (1, 4, 5, 9, 2 points for each question, remaining spaces 1 point)

1. It is a three-digit number, a multiple of 2, 3 and 5, and its minimum value is ().

2. In 0- 10, what is neither a composite number nor a prime number is (). It is both odd and composite () and even and prime ().

3. The greatest common divisor of a number is 27, this number is (), the smallest multiple of a number is 24, this number is (), their greatest common divisor is (), and their least common multiple is ().

4. The order of 0. 18 is ().

5. If b÷ A = 8, then a÷ B = ().

6. The height of the parallelogram is increased by 2cm, and the bottom is decreased by 2cm. The area of the new parallelogram is larger than that of the original parallelogram ().

7.( )÷5= = =0.6= 15÷( )

8. The maximum true score of denominator 9 is (), and the maximum false score of numerator 9 is (). They are different ().

Third, judge right or wrong. (10)

1, a three-digit number consisting of 2, 3 and 4, can be divisible by 3. ( )

2. All false scores are greater than 1. ( )

3. A factor with the largest number is itself. ( )

The multiple of a number is limited, but its factor is infinite. ( )

5. Prime numbers cannot be multiples of 2, 3 or 5. ( )

6. The perimeters and areas of the two trapezoids are equal. ( )

7. Draw a rectangle into a parallelogram with equal area. ( )

1 kg of 8 and 35 is as heavy as 3 kg of 15. ( )

9. The numerator and denominator of the simplest fraction have no common factor. ( )

10, because 4×5=20, 4 and 5 are all factors, and 20 is a multiple. ( )

Fourth, make a choice. (10)

1. If 4□6 is a multiple of 3, you can put () in □.

a、 1、2、3 B、2、4、6 C、2、5、8

2. The bottom of the triangle remains unchanged. If the height is expanded by 4 times, then its area ().

A, expand by 4 times B, expand by 2 times C, which is uncertain.

3. Cut a parallelogram along the height, and you may get ().

A, triangle and trapezoid b, parallelogram and trapezoid

C, two triangles D, two trapeziums

4. Divide the 2m-long rope into 5 sections, each section is ().

a，25m b，25 C， 15m

The least common multiple of 5, 8 and 9 is ().

a、8 B、9 C、72

6. Among the following scores, the score closest to 1 is ().

a、 17 B、89 C、 13 12

7. Naughty and Xiaoxiao donated their 15 books to the Hope Stack respectively.

A, Shao Xiao donated many books; B, naughty donated many books.

C. Laughing and naughty donated as many books as D. It is impossible to determine who donated more books.

8. Among the following scores, the one that is not the simplest score is ().

a、25 B、2436 C、97 D、 12 19

9. 13 of a line segment is 2cm, and the length of this line segment is ().

A, 4cm b, 2cm c, 6cm

There are () factors of 10 and 30.

a，4 B，8 C，2

Fifth, solve the problem. (30 points)

1. There is a path with a length of 8m and a width of 1 m on the grass of the parallelogram. Find out the area of the grass.

2. Divide 20 chocolates among 3 people equally. How much will everyone get? What about eight people on average?

3. Two engineering teams, Team A and Team B, built a road with a length of 1 1,400 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road?

The distance from Huainan to Wuhu is 240 kilometers. At 6: 30 every morning, the bus from Huainan leaves for Wuhu at a speed of 58 kilometers per hour, and the bus from Wuhu leaves for Huainan at a speed of 62 kilometers per hour. When did the two cars meet on the road?

At the forest sports meeting, the deer and the lamb ran the same distance, with 56 points for the deer and 67 points for the lamb. Who runs faster?

6. A story book. Xiaohong read 2 15 on the first day, 14 on the second day, and the third day was less than the sum of the previous two days 15. How many books did she read on the third day?