1. Fill in the blanks: (2 points for each question, ***28 points)

1, in 8, 0, 57, -5, 60, 0.89, -83, -4.5, 27, 1, () is a natural number and () is an integer.

The factors of 2 and 48 are: ()

The factor of 36 is: ()

The common factor of 48 and 36 is: (), and the greatest common factor is ().

3, 2, 10, 13,22,39,64,57,6 1, 1,73, 1 1 1.

Odd numbers are: Even numbers are:

The prime number is: the composite number is:.

4. Some numbers are both factors of 54 and multiples of 6. They are:

5、30= 1×30=( )×( )=( )×( )=( )×( )

6. Odd+Odd = () Even-Even = ()

Odd even number = () odd number × odd number = ()

7. If the area of a triangle is 60 square centimeters, then the area of a parallelogram with the same height as its base is ().

8. The upper bottom of the trapezoid is 7 cm, the lower bottom is 5 cm, the height is 4 cm, and its area is () square cm.

9. The area of triangular iron sheet is 3 square meters, its bottom is 3 meters long and its height is () meters.

10, a ribbon is 3 meters long. It is divided into 5 segments on average, each segment is () meters long, and one segment accounts for () of the whole length.

1 1, a fraction whose denominator is the largest prime number in 10, and the smallest true fraction is (). The lowest error score is ().

12,2430 = 4 () = () 25 = () ⊙ () = () (simplest fraction)

13. In a verbal contest of 15, Xiao Ming got 45 answers correctly, Xiao Fang made two more mistakes than Xiao Ming, and Xiao Fang got () () correctly.

14. The switch in Xiaohong's bedroom was off at first. If you switch on and off continuously now, the light will turn off () after 13 times, and it will turn off () after 200 times. (on or off)

Second, the judgment question. (Mark "√" for the right and "×" for the wrong) (2 points for each question, *** 12 points)

1 and multiples of 4 are greater than multiples of 40. ( )

2. Numbers with 0, 2, 4, 6 and 8 are all multiples of 2. ( )

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

4. Two triangles with equal area have equal base and height. ( )

5. Two identical trapezoids can be combined into a parallelogram. ( )

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

Third, multiple choice questions. (Choose the serial number in brackets) ((**7 points)

1, in 60 = 12× 5, 12 and 5 are all 60 ().

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

2. Only the number of 1 and its two factors are ().

A, composite number b, odd number c, prime number d, common factor

3. Within100, except prime numbers, * * * has () complex numbers.

A, 74 B, 75 C, 50 D, countless

4, 49 molecules plus 12, the size of the fraction remains the same, and the denominator should be added ().

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

5. Draw the largest triangle in a parallelogram with a base of 8 decimeters and a height of 6 decimeters. The area of this triangle is equal to the area of the parallelogram ().

A, 2 times b, half (12) C, 48 square decimeter d, 24 square decimeter.

6. The greatest common factor of numerator and denominator is 1, and the score is ().

A, true score b, false score c, simplest score d, with score.

7. The upper bottom of the trapezoid is increased by 2 cm, and the lower bottom is decreased by 2 cm, and the height remains unchanged. Compared with the original area, its area is ().

A, bigger B, smaller C, constant D, I don't know the height, so I can't compare it.

Fourth, completely solve the problem as required. (***38 points)

1, from the five numbers 0, 2, 3, 9 and 5,

(1) Choose three numbers to form three numbers, and the multiple of three is:

(2) Choose the largest of the four numbers whose composition is a multiple of 2 and 5.

(3) The largest odd number is:

(4) Select two numbers, and the prime number is:

(5) Choose two numbers (except 0) to form the simplest score.

2. Choose the appropriate score and fill it in the horizontal line. (6 points)

1827 1520 68 46 1 122 12 16 142 1 9 12 3224

The score equals 23:

The score equals 34:

3. Use appropriate scores to represent the shaded parts below. (4 points)

▲▲▲▲▲▲

△△△△△△

△△△△△△

( ) ( ) ( ) ( )

4. Write the greatest common factor of each group directly. (9 points)

24 and 36 () 34 and 5 1 () 60 and 50 ()

18 and 73 () 25 and 26 () 3 1 and 13 ()

1 and 1000 () 35 and 33 () 6, 12 and 72 ()

5. Find the area of each picture below. (9 points)

Area of parallelogram:

Area of triangle:

Trapezoidal area:

Practice and application of verb (abbreviation of verb). (*** 15)

1. There are 80 balls in a box in the school gymnasium, of which 20 are red balls, 36 are yellow balls and the rest are white balls. How many balls are there in the total number of three kinds of balls with the simplest score?

2. A parallelogram paddy field with a bottom of 90 meters and a height of 60 meters. If fertilization is 0.2 kg per square meter, how many kg does this rice field need to be fertilized?

3.36 red balls and 24 yellow balls are the same size and packed in the same box. Every ball has just been played. How many can each box hold at most? How many boxes does * * * need at this time?

Six, plus questions: (30 points)

1, bright primary school fourth grade in a math exam, the average score is exactly 90 points, the total score is □68□, so how many students are there in this grade?

2. Numbers after observation: 1, 1 12, 2, 2.5, 3, 144, (), 4( )8, () 10, () 6 ...

3. Cut the largest triangle in the right trapezoid. What shape are the remaining figures? How much smaller is the remaining pattern than the cut pattern?