First, back to the referee. 5 points

1, the numerator and denominator of the fraction are multiplied or divided by a number (except 0) at the same time, and the size of the fraction remains unchanged. ( )

2. Two triangles with equal areas have equal bases and heights. ( )

3. If it is a false score, then A must be greater than B. ()

4. The numerator and denominator of a fraction are prime numbers, which must be the simplest fraction. ( )

5. If A is odd, the result of 1093+89+A+25 is still odd. ( )

Second, I will choose. 5 points

1. To calculate the trapezoidal area with acm at the upper bottom and bcm at the lower bottom and 3cm in height, the formula () should be used.

a、S=ab B、S=3a÷2 C、S=3(a+b)÷2 D、S=ab÷2

2. In 60 = 12× 5, 12 and 5 are 60 ().

A, multiple b, even c, prime d, factor

3, numerator plus 12, the size of the fraction remains the same, the denominator should be added ().

A, 12 B, 36 C, 27 D, can't do it.

4, 3, as shown in the figure, A gets 1 point for touching the white ball and B gets 1 point for touching the black ball, which is the fairest in the box ().

Xiaojun started from home and went to the bookstore to buy books. When he was halfway through. Remember not to forget to bring money. So he went home to get the money, then went to the bookstore, bought some books and went home. The following figure () accurately reflects Xiaojun's behavior.

B.C.

Third, the mathematical maze. 26 points

1, the smallest natural number is (), the smallest odd number is (), the smallest prime number is (), and the smallest composite number is ().

2. The area of triangle is 24cm, and the area of parallelogram with equal base and equal height is () cm.

3. The decimal unit is (), and there are () such units. If you remove () decimal units, it is 3.

4. Divide the 5m-long rope into 8 segments, each segment is (), each segment accounts for () of the whole length, and each segment is 5m ().

5、( )÷8= =0.375=9÷( )=

6. Prime number: 21= ()+(); ? ( )=( )×( )。

7, put 36 balls in a box, each box contains the same amount, there are () kinds of loading methods.

8. At this year's Asian Games in Doha, the China delegation won 3 16 medals, including gold 165, silver 88 and the rest bronze. Gold, silver and bronze medals each accounted for the total number of medals.

9. The area of right-angled parallelogram is 40 square centimeters.

The area of this colorful triangle is () square centimeters.

10. The shadow changes of the following set of graphs are regular. Please draw the shaded part of the fourth picture according to this rule.

Fourth, ingenuity. 28 o'clock (6+5+6+6+5)

1, find the greatest common factor and the least common multiple of the following groups.

28 and 7 5 and 8 8 and 9

2. Turn a fake score into a belt score or turn a belt score into a fake score.

=

3. Calculate the following questions and how to calculate them simply.

2 -( + ) + + - +

4. Solve the following equations.

5Y-2Y= 18 +X= X- =

5. Find the shadow area. (Unit: cm)

Verb (abbreviation of verb) problem solving: 36 points (4+4+4+5+5+5+5+5+5+5).

1. A parallelogram billboard with a bottom length of 14cm and a height of 3.2cm If 0.7kg of paint is used per square meter, how many kilograms of paint should this billboard use at least?

3.36 red balls and 24 yellow balls are the same size.

They are packed in the same box and each ball has just been played.

How many can a box hold at most? How many boxes does * * * need at this time?

5. Two engineering teams, Party A and Party B, built a highway with a length of 1 0,400 meters. They started construction from both ends at the same time. Team A builds 80 meters a day, while Team B builds 60 meters a day. How many days will it take to complete this highway? (Equation solving)

7. There are 20 5 yuan and RMB 10. 1 * * RMB 175. How many RMB are there in 5 yuan and RMB 10?

2. A school planted 65,438+000 trees in spring, and 93 trees survived. What is the percentage of living and dead trees in the total number of trees?

4. The cross section of a dam is trapezoidal, with a width of 4cm on the top, 7cm on the bottom and a height of 1.8cm. Find the cross section area of this barrage.

6. A square red paper with a side length of 66 cm can be made into a triangular red flag with a bottom length of 33 cm and a height of 22 cm. How many noodles can you cook at most?

8. Xiaoming's living room is 6 meters long and 4 meters wide, and now it needs to be replaced with floor tiles. There are two kinds of floor tiles, which is the most economical?

Type A brick: side length 30cm, unit price 27 yuan/block.

Type B brick: the side length is 50cm, and the unit price is 60 yuan/block.