Final examination paper and answer of mathematics in the second volume of the fourth grade of primary school

First, fill in the blanks.

1, rewrite 499000000 into "100 million", and one of the numbers is ().

2. 5 square meters and 8 square decimeters = () square meters 10. 1 ton = () kg.

10cm 5mm = () cm 2 yuan 5 points = () yuan.

3. When both b and c are not equal to 0, a \b \c = a \u ().

4. Expand by 0.36 to 100 times, and move the decimal point to the left by one place.

5. Move the decimal point 0. 126 to the right by two digits (), and move the decimal point () to the left by three digits is 0.0068.

6. In a right triangle, one acute angle is 550 and the other acute angle is ().

7. Insert colored flags on one side of the deer (both ends), one side every 5 meters, and 20 sides. This path is () meters long.

8. According to the fact that the sum of the internal angles of the triangle is 180, find the sum of the internal angles of the following two figures.

Trapezoidal () degree, pentagonal () degree.

9. The number consisting of four ones, eight tenths and six thousandths is (), which is pronounced as ().

10, after rounding, a two-digit decimal is 9.5, and the maximum of this two-digit decimal is (), and the minimum is ().

The five numbers 1 1, 0.58, 5.8, 5.08, 0.508 and 0.558 are arranged in descending order, followed by ().

Second, the judgment question. (Mark "√" for the right and "×" for the wrong)

1, multiply 0 by any number to get 0, and divide 0 by any number to get 0. ( )

2、35×(7×3)=35×7+35×3。 ( )

3. The three sides are 4cm, 4cm and 8cm respectively. The triangle is an isosceles triangle. ( )

4. Add or delete zeros after the decimal point, and the size of the decimal point remains unchanged. ( )

5, 7.05 and 7.0599 all have 7. 1. ( )

6. An isosceles triangle is an equilateral triangle. ( )

7. More than 2.4 and less than 2.6 have only one decimal place. ( )

8, 0.58 and 0.580 are equal in size, and the counting units are also equal. ( )

9.a is 40 southeast of B, or 50 southeast. ( )

10. There are 6 white balls, 3 red balls and 3 black balls in the box. The chances of touching the red ball and the black ball are equal. ( )

Third, multiple choice questions.

1, and two triangles with acute angles of 60 degrees are ().

A, acute triangle b, obtuse triangle c, equilateral triangle

2. The number closest to 10 in the following figures is ().

a、9.98 B、 10. 10 1 C、 10.05

3. One factor of a× b is multiplied by 10, and the other factor is also multiplied by 10, and the product is equal to ().

A, product multiplied by 100 B, product multiplied by 20 C, product multiplied by 10.

4, the following formula can be used to simply calculate the laws of multiplication and distribution is ().

a，( 125+90) × 8b，52×25×4 C，7.6 × 1.25+2.4

5, the following figures don't read "zero" is ()

a、807. 17 B、270.05 C、400.6 1

6. In the figure below, "0" has been deleted, and the size remains the same ().

A, B, C and 7: 50.

There is a () decimal between 7, 2.3 and 2.6.

A, 3 B, 30 C, countless

8. First move the decimal point of a decimal to the right, and then move it to the left by three places, the original number ().

A, expand 10 times b, shrink 10 times c, shrink 100 times.

9. It took three minutes to saw a piece of wood into three pieces. It will take () minutes if this piece of wood is sawed into five sections.

a、5 B、6 C、7.5

10, two identical isosceles right triangles, which can be spelled as ()

A, rectangle b, square c, parallelogram

Fourth, the calculation problem.

1, oral calculation.

0.38+0.06= 64.2+5.7= 72÷9×7=

0.97-0.09= 12.8-9.86= 17.05-4.58 =

3.5+0.6= 5-0. 15= 4.35+5.36=0÷78= 2.05÷ 100= 0.093× 100=

2. Calculation can be simplified.

200-( 132+ 1080÷36) 4.7+9.69-5.46 99×39+39

520-3000÷75×6 72× 125 5000÷8÷ 125

Fifth, solve the problem.

1. The school has purchased 3600 new books, which will be distributed to the first to sixth grades of the whole school. There are 4 classes in each grade. How many books are distributed in each class on average?

Xiaolan's mother took 50 yuan to buy food. Buy meat dishes 28.75 yuan, buy vegetarian dishes 6.35 yuan. How much is left?

3. The weight in winter and winter is 38kg. My cousin weighs half as much as him, while my grandfather weighs four times as much as my cousin. How many kilograms does grandpa weigh?

4. In the first week, the road team built a section of road for 6 days, with an average of 100 meters per day. The second week will be completed in four days, with an average of120m per day. How long is this road?

5, the zoo launched "one-day tour" activity price two schemes:

Option 1: 150 yuan/adult; Every child, 60 yuan,

Scheme 2: More than 5 people (including 5 people), each person 100 yuan.

Now there are four adults and six children to play. Think about how to buy tickets to save money.

Reference answer

1. 1, 4.99 million 2,5.081010.52.053, b× c.

4、3.6 5、 12.6 6.8 6、35 7、95

8、360 540 9、4.806 10、9.49 9.45

1 1、5.8﹥5.08﹥0.58﹥0.558﹥0.508

Second, * * * √.

Third, C A A C C C B B

4.0.44 69.9 56 0.88 3.94 12.47 4. 1 4.85 9.7 1 00.0205 9.3