1. The first volume of mathematics problems in the third grade of primary school
First, take "10,000" or "100 million" as the unit, and find the approximate value of the following numbers: 886,500 ≈.
9324500≈
39400000≈
9998543≈
98005005≈
1943009546≈
496000003000≈
89457005900≈
Second, write the number as required.
(1) A five-digit number consists of two zeros and three eights, of which only one zero () is read, two zeros () are read, and two zeros () are not read.
(2) The five digits consisting of 0, 2, 9, 7 and 4 are (), and the smallest five digits are ().
(3) A number consists of 383 million and 421. This figure is (), which is about () million.
(4) The numbers 6, 9 and 0 are grouped into different three-digit * * * numbers with (). From small to large, it is ().
Third, solve the problem.
1. The zoo had 693 visitors in the morning, left at noon 126 people, and 245 people came in the afternoon. How many tourists are there in the zoo at this time? How many people come to the zoo all day?
2. There are 267 peach trees in the orchard, more than peach trees 138 pear trees. How many peach and pear trees are there?
3. There are 22 boys and 24 girls in Class 3 (1). The number of students in Grade Three is six times that of Class Three (1). How many people are there in Grade One and Grade Three?
4.9 yuan for a pen and 66 yuan for xx. How many pens can I buy at most? How much money is left?
5.37 students went boating. Each boat can carry five students. How many ships do they need at least?
2. The first volume of mathematics problems in the third grade of primary school
First, calculate the following questions. 1, the number is written directly:
3 12+5 12= 1-39= 23+ 13= 1-38-28=
1324- 1 124= 47+37= 1- 12= 19+29+39=
68-48= 79-29= 56- 16= 13+ 13+ 13=
2. Vertical calculation:
408×8= 780×6= 6 18×9=
3. Recursive equation calculation:
360+2 10×8 24÷3×7 1 6890-358×2
Second, solve the problem.
1, Xiao Ming reads story books. On the first day, he read 25 of the book, and the rest the next day. How many books did he read the next day?
2. There are 36 students in a class, and boys account for it. How many boys are there? How many girls are there?
3, a piece of cake, Xiaodong ate its 36, Xiaoming ate its 26, who ate more, how many cakes did a * * * eat?
Xiaodong's family has 64 Jin of rice. Eat on the first day, eat on the second day. How many Jin of rice did a * * * eat these two days? How many kilograms of rice are left?
3. The first volume of mathematics problems in the third grade of primary school
First, I can calculate.
1, write directly.
300×5= 8 10÷9= 96÷3= 88÷2=
420×2= 380×0×25= 240÷6= 18×3=
2. Use vertical calculation, use inspection. ※.
282×7= 160×6= 403×8=
※657÷3= ※736÷6=
3. Estimation and calculation.
102×4≈ 396÷2≈ 495×6≈ 604÷3≈
4. Off-mold calculation.
76+24×53 76-96÷8 (47+25)×4
86-26×34 53÷3+94 (258- 123)×7
Second, solve practical problems.
1, a piece of cloth, used to make sheets, used to make curtains, a * * * used to use several parts of this cloth?
2. The school bought 13 football, and basketball bought 8 more than football. How many basketballs did you buy?
There are 5 baskets of pears in the fruit shop, and there are 25 more apples than pears. How many times are there more apples than pears in a basket?
There are two bookshelves in the book corner of Class Two, Grade Three. Each bookshelf has three floors, and each floor can hold an average of 20 books. How many books can a * * * hold?
There is a line that can be used to form a rectangle with a length of 8 cm and a width of 4 cm. If this line is used to form a square, what is the side length of the square?
4. The first volume of mathematics problems in the third grade of primary school
1. A rectangular steel plate is10m long, 4m wide and weighs 8kg per square meter. How much does this steel plate weigh? 2. The meeting room is15m long and 8m wide, with 2 people per square meter. How many people can sit in this conference room?
A rectangular vegetable field is 25m long and 8m wide. Now the width is expanded to 12 meter. What is the area of this rectangle now? How much has the area increased compared with the original?
4. Lay floor tiles for a room 5 meters long and 3 meters wide. If there are 25 tiles per square meter, how many tiles does this room need to be paved?
5. The floor of a classroom is 8 meters long and 6 meters wide, and the floor is paved with floor tiles, with a side length of 2 meters. How many such tiles does a * * * need?
6. The circumference of a rectangle is equal to the circumference of a square. If the side length of a square is 18 decimeter and the length of a rectangle is 24 decimeter, what are the areas of the square and rectangle respectively?
7. A square vegetable field with a side length of17m can receive 40 kg of vegetables per square meter. How many Jin of vegetables can this land collect?
In the final exam, Hailin scored an average of 90 points. She got 85 points in Chinese and 92 points in English. How many points did she get in the math exam?
9. Uncle Li enclosed a square piece of land with a 40-meter fence. What is the area of this land?
10. 3360 orange trees will be planted in the orchard. Plant one row for every 40 trees, and 62 rows have been planted. How many rows are left?
5. The first volume of mathematics problems in the third grade of primary school
1. Fill in the blanks with 1. After 90, adding () 0 is 900,000, and adding () 0 is 900 million.
2. The two numbers adjacent to 1000000 are () and ().
The number 3.500005005 means () on the left, () in the middle and () on the right.
4, People's Education Edition, the first volume of primary school mathematics exercises: 57925680 contains two levels () and (), which is () digits, which means ().
5. The sum of the smallest five digits and five digits is ().
Second, the judgment question
1, ten thousand bits, one hundred thousand bits, one million bits and ten million bits are all units of counting. ()
2. When comparing the sizes of two numbers, look at the number in the position first. ()
3. The number of natural numbers is infinite, and there is no natural number. ()
4. The smallest seven digits are less than eight digits 1. ()
5. The four-digit number consisting of 5, 7, 9 and 0 is 9705. ()
Third, write down the following figures.
US$ 450 million: six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six hundred and sixty-six, six sixty-six, six sixty-six, six sixty-six, six sixty-six, six sixty-six, six, six, six, six, six, six, six, six, six
Three million four hundred and forty-seven thousand yuan.
508 billion _ _ _ _ _ _ _ _ _ _ 6.0407 _ _ _ _ _ _ _ _ _ _