Fill in the blanks.
1 and 1000 have () hundred.
2940 consists of () one hundred yuan and () ten yuan.
3. The number of 409 tens is ().
4. 2356 consists of () thousand, () hundred, () ten and () one.
5. Write down the following figures.
Two hundred, five tens and six in Zhang Yiyuan, and four hundred and eight in Zhang Yiyuan.
6, three digits is (), the smallest three digits is (), they are different ().
The four digits of 7 are (), and the smallest four digits are (). They are different ().
8. The three digits are (), and the smallest four digits are (). They are different ().
9. In the numerical table, the third digit from the right is (). The fourth place is ().
10, a four-digit number with () digits.
1 1, a pear weight 150 (), and a pumpkin weight 4 ().
A volleyball weighs 450 () and a bag of instant noodles weighs ()
12. Fill in ">"
2 kg ○2000 g, 5 kg ○4900 g.
800g ○ 1 kg 2500g ○ 3kg
13, find the method.
2 4 8 __ 14 22 ___ 44 58
14, fill in the blanks according to the law.
□■△__ __ □▲△□■
△▲▲■■□__ △▲
15、
A 2 cent coin weighs about 10 (). Xiaoming weighs about 30 ().
An egg weighs about 70 () and a watermelon weighs about 5 ().
A piece of candy weighs about 5 () while a goat weighs about ().
A bottle of mineral water weighs about () and a bowl of rice weighs about 100 ().
16、
A goose weighs 6 kilograms.
1 The weight of a goose is equal to the weight of two ducks.
The weight of two ducks is equal to the weight of three chickens.
1 The weight of a duck is equal to () kg; The weight of a chicken is equal to () kilograms.
17、962 1=( )+( )+( )+( )
6080=( )+( )+( )+( )
4308=( )+( )+( )+( )
18, arrange the following numbers in order.
999 1080 10000 1290 2 100
()& lt()& lt()& lt()& lt( )
19, there are more people on the train than on the plane, and there are fewer people on the plane than on the ship.
() It can seat about 1500 people, () it can seat about 350 people and () it can seat about 300 people.
Second, estimate.
1, Beijing to Dalian, air tickets to 620 yuan, train tickets 147 yuan. Taking a train is about () yuan cheaper than flying.
2. A book has 237 pages. After reading 200 pages, there are about () pages left.
3. There are 150 students in Grade One and 170 students in Grade Two. Two grades * * * need () disposable syringes.
4. There are 528 bottles of mineral water in cold drink shops, of which 184 bottles were sold, about () bottles. I sold 2 19 popsicles in the morning, 392 in the afternoon and about () today.
5. The Shanghai Radio and Television Tower is 468 meters high, and the Central Radio and Television Tower is 405 meters high. Shanghai Radio and Television Tower is about () meters higher than the Central Radio and Television Tower.
6. According to statistics, there are 14 peaks over 8000m above sea level in the world, of which 10 is located in the Himalayas. Among them, Mount Everest is the highest mountain in the world, with an altitude of about 8848 meters. Where the approximate value is () and the exact value is ().
7. The original price of the tape recorder is 359 yuan, and the current price is 23 1 yuan, which is about () yuan cheaper.
The original price of the TV set is 965 yuan, and the current price is 748 yuan, which is about () yuan cheaper.
Third, solve the problem.
1, electric fan 1, 134 yuan, bicycle 1, 289 yuan.
Electric fan 2278 Yuan Bicycle 2 196 yuan
Electric fan 3, 125 yuan for bicycle 3, 3 15 yuan.
Miss Wang has 500 yuan's money. What kind of bicycles and electric fans can I buy?
2. 2 bags of washing powder, 800 g/kloc-0 per bag/bag of washing powder weighs 2 kg, which is heavier? Why?
Xiaoming went to the park to play bumper cars. 3 yuan bumper cars/people, Xiaoming spent * * * 12 yuan. How many times did Xiao Ming call?
Xiaohua sent a letter to the post office. 60 cents stamps are issued in this city, and 80 cents stamps are issued elsewhere. Xiaohua has 1 letter sent to this city and 3 letters sent to other places. How much is a letter?
5, 8 bowls, 14 chopsticks, how many guests can you divide?
There are 22 boys and 20 girls in my class. A group of 7 students, how many groups can the whole class be divided into?
7.①5 pairs of socks 16 yuan, ② 1 5 yuan, ③4 pairs of socks 12 yuan, which kind of socks is cheaper?
8. The first granary has 700 bags of wheat, the second granary has 800 bags of wheat and the second granary has 1000 bags of rice.
(1) a * * * how many bags of wheat?
② How many bags of wheat are there than rice?
What other questions can you ask?
9. Apple: 2 yuan 500g Litchi: 8 yuan 500g.
Peach: 1 yuan 500g Watermelon: 3 yuan 500g.
Banana: 5 yuan 500g pineapple: 3 yuan 500g.
How much does it cost to buy 2 kilograms of apples and 2 kilograms of peaches?
How much is 500 grams of litchi seed and 2500 grams of watermelon?
What other questions can you ask? Can you answer that?
10, Theater One has 400 seats. Bright primary school went to see a puppet show. There are 197 students in grade one and 20 1 student in grade two. It is estimated that the two grades can sit down and watch the puppet show.
1 1, electric fan 245 yuan, rice cooker 187 yuan. Mom has 400 yuan. Are these two enough?
Reference answer
I. 1( 10), 2(9)(4), 3(490), 4(2)(3)(5)(6), 5(256)(408), 6 (999) (65439). 10 (thousands), 1 1 (grams) (grams) (500g),12 (=) (>) (<; ) (<), 13( 16) (3 1), 14 (▲) (■), 15 (g) (kg) (g) 17 (9000) (600) (20) ( 1) (6000) (0) (80) (4000) (300) (0) (8), 18 (999)
Two. 1(70), 2(40), 3(320), 4(340), 5(60)
Three. 1 (electric fan 1, bicycle 1- bicycle 3) or (electric fan 1, bicycle 3) or (electric fan 2, bicycle 1- bicycle 3), 2 (the bag of1is heavier).