1. When adding and subtracting two digits with a pen, () should be aligned and counted from ().

2.74 Subtract 7 continuously to get () () ().

Xiao just bought a pen of 17 yuan and 38 yuan's schoolbag. He has 50 yuan money on him. Would you please help him estimate? ( )

4. The difference between the minimum two digits and the maximum two digits is ().

5. When doing the addition problem, one digit is full () and one digit is forward ().

6. When doing subtraction, if the number of digits is not enough, you should borrow 1 from the position of () as () to do subtraction.

7. A number plus 15 gets 47, which is (), and a number minus 19 gets 37, which is ().

8. There are only 45 books. After Dandan gave him 14 books, they had as many books. Dandan originally had () books.

9. Addition and mixing operations are calculated in the order of (), and those with brackets should be calculated first.

Second, multiple-choice questions:

1. In the following formula, () is the same as 37+ 15.

a、32+ 15 B、37+ 17 C、47+5

2. There are 32 apples, 9 pears are more than apples, and there are () apples and pears.

a、73 B、57 C、4 1

There are 15 tigers, 25 big monkeys and 17 little monkeys in the zoo. There are () monkeys in the zoo.

a、8 B、57 C、42 D、32

There are 26 boys and 25 girls in Grade Two. Give them 50 exercise books each. Is it enough? ( )

A, is it enough b, not enough c, not sure

Fill in the blanks as required.

(1) Compare dimensions.

32+7( )26 43+4( )4+34 55+ 16( )22+4

6+30( )76-30 73-27( )60- 16 54+4( )60

(2) What is the maximum number of words in brackets? 30+48 >()88-32 & gt； ( )

(3) What is the minimum number of words in brackets? 73-54 & lt； () 16+30 & lt； ( )

Four, column vertical calculation.

47+39= 20+4 1= 77-29= 90-24=

25+38+ 19= 90-32-27= 63-( 13+3 1)= 32+(49-2 1)=

Verbs (short for verb) solve practical problems:

1, how much is the sum of 48 and 37 more than 56? The subtraction is 34, the difference is 47, and what is the minuend?

2. Car: 25 yuan Bear: 28 yuan Plane: 45 yuan Doll: 19 yuan.

(1) How much does it cost to buy a car and a doll?

(2) Xiaoli brings 70 yuan money. She wants to buy a small plane and a bear. Is there enough money?

3. One class plants 43 pots of flowers a year, and two classes plant 7 pots of flowers a year. How many potted flowers are planted in two classes?

4. 52 trees were planted in the first grade, and 9 trees were planted in the second grade. How many trees were planted in two grades?

5. Students line up, counting from the back, Xiaoming ranks 23rd, counting from the back, Xiaoming ranks 3 1. How many people are there in this group?

1. Xiaoming has 45 books, Xiaoli has 39 books, and Xiaogang's books are 25 less than their total. How many books does Xiaogang have?

7. Clothes: 45 yuan pants: 63 yuan skirt: more expensive than clothes; 23 yuan shoes: cheaper than pants 12 yuan.

(1) How much is a skirt? (2) How much is a pair of shoes?

(3) How much is a dress cheaper than a pair of trousers?

(4) Put forward a math problem and answer it yourself.

Xiaoling is 9 years old, her grandmother is 62 years older than Xiaoling, and her mother is 35 years younger than her grandmother. How old is her mother this year?

9. Xiaohua has a book with 94 pages. He read 28 pages on the first day and 9 pages on the second day. How many pages are left?

10, there are 28 boys in Grade One, and 7 girls are less than boys. How many students are there in Grade One?

1 1. There are 75 clothes in this shop. After selling 25 pieces, deliver 18 pieces. How many clothes are there in the shop now?

12. There are 100 watermelons, of which 45 were carried away by grandpa and 28 by grandma. How much is left? (two calculation methods)

Method 1: Method 2:

13. Length of a bundle of wires 100 meter. A class used 23 meters first, then 27 meters. How many meters did it take? Class two needs 40 meters. Are there enough wires left?

14, education

The education building is 38m high, the culture building is15m higher than the education building, and the science and technology building is 8m higher than the culture building. How many meters is the science and technology building?

15, Dongdong laid 86 eggs, and Xixi laid 19 more eggs than Dongdong. How many eggs did Xixi lay?

16. The Shenzhou VII spacecraft launched by China has circled the earth for 42 times. Shenzhou VI flew 38 times more than Shenzhou VII, but Shenzhou VII took three astronauts. How many laps did Shenzhou VI fly?

What other questions can you ask?

17, Yucai Primary School has 24 male teachers and 38 female teachers. How many teachers are there in Yucai Primary School? Blue Sky Primary School has 45 teachers, how much less than Yucai Primary School?

18, Xiaohong has made 25 flowers, and Xiaoli will make 38 more. How many flowers can she make? If you make 44 more yellow flowers, how many yellow flowers and red flowers will you make?

19, 26 in Class 1, Grade 2, and 38 in Class 2, Grade 2. Forty-two pictures have been posted. How much is left?

20. Shopping center activities: 65,438 yuan less for 50 yuan.

Doll: 28 yuan bear: 15 yuan car: 26 yuan building block: 24 yuan plane: 35 yuan

How much does it cost to buy a doll and a bear?

(2) Can you save 10 yuan by buying a car and adding a box of building blocks?

(3) Can you ask other math questions and answer them?