1. There are two shaded parts A and B in the diagram. It is known that the area of A is 18.9 cm2, and the area of B is () cm2.

2. The circumference of a semicircle with a radius of 40 cm is () cm.

3. The radius of the sector is 2 decimeters, the degree of the central angle is 720, and the area is () square decimeters.

4. Put 2 kilograms of fruit candy into 3 bags on average, each bag weighs () kilograms, and each bag accounts for () of the total weight.

5. When the radius of a circle increases by 3 cm, the circumference increases by () cm.

6. Two people eat two apples in five minutes, so 37 people need () points to eat 37 apples.

7. Rewrite 18x = 39y (x ≠ 0) into the ratio of y: x = ().

8. The sum of the simplest fractions with two identical molecules is 1, the ratio of denominators of these two numbers is 7: 5, and the numerator of these two fractions is ().

9. The quotient obtained by dividing a number by 23 is equal to the remainder. The minimum number is () and the maximum number is ().

Fifteen percent of 10 and 18 are written as ().

1 1, and the number a is more than 25% of the number b, that is, the number b is less than the number a ().

12, a batch of parts, both parties can cooperate for 8 days, Party A can do it alone 12 days, and Party B can do it alone.

13. Cut a circular scissors into an approximate rectangle, and increase the circumference by 6 cm. The circumference of this circle is () cm and the area is () cm2.

14. The father is 36 years older than his son this year. Three years later, my father is five times older than my son, so my son is () years old this year.

15, plus the quotient of 0.36 divided by 9, half of the total is.

Second, the judgment (65438+ 0 points per question)

1, two triangles with equal areas can definitely make a parallelogram. ( )

2. The area of an isosceles right triangle is 50% of the area of a square with the hypotenuse as the side length. ( )

3. If both A and B are numbers greater than 0, then A

4. If the number of A is 3 times less than that of B, then the number of B is more than that of A 1 .. ()

5. The scientific and technological team used a bag of seeds for germination test, and the ratio of the number of ungerminated seeds to the number of germinated seeds was 1: 24, so the germination rate was 96%. ( )

Third, the choice (2 points per question)

1, and the area of the triangle is equal to half of ().

A. Square B. Rectangular C. Parallelogram D. Trapezoid D. Equal to its bottom, equal to its height.

There is a rectangular piece of paper, 6 cm long and 4 cm wide. There must be at least () pieces of paper to form a square.

12 C.24 D.6。

3, the reciprocal of the false score is ()

A, greater than 1 B, less than 1 C, greater than or equal to 1 D, less than or equal to 1.

4. A box with a volume of 40cm× 12cm× 4cm can hold at most 10cm× 3cm× 3cm bricks ().

The first volume of mathematics in the sixth grade of primary school: final exam (2) 20 1 1-06-29

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16(B)2 1(C)22(D)2 1

5, A and B are non-zero natural numbers, and 40% of A is equal to B, so A is () compared with B.

A.a & gtb B.a = b C.a

6. If a, B a÷b=c are three different natural numbers, in A b = c, the following statement is wrong ().

A and a are equal to the product of b and c, and b must be the divisor of a.

C and a are the least common multiples of b and c, and d and a must be divisible by B.

Four, oral calculation (65438+ 0 points per question)

1、34×75+75×26=2、=3、( 12.5+)× 8=

4、0.78+0.22= 5、3+3÷6=6、=

Five, simple calculation (3 points per question)

1、=2、 =

3、 1664、39×24+39×46+39×30

Six, calculate the following questions (3 points per question)

1、2、

Seven, equation (3 points per question)

1、-2、 = 1.2

Eight, text questions (3 points each)

1, a number increases its 40% to 28, what is the 25% of this number?

2、

3,4.5 plus 1.5