In the first unit of the second grade mathematics, we learned the practice and application of addition and subtraction. This is very important basic knowledge, because they are indispensable calculation methods in our daily life. The following is the content of the test paper in this unit. Let's check our study results.

First, the oral calculation questions

1.34+28=__________

2.56-23=__________

3.45+ 16=__________

4.87-39=__________

5.23+56=__________

6.69- 18=__________

7.77+33=__________

8.9 1-48=__________

Second, fill in the blanks

1.56+__=78

2.87-__=42

3.35+__=49

4.63-__= 18

5.89+__= 100

6.72-__=45

Third, the application problem.

1. Xiaoming has 35 sweets. He gave Xiaohong 18. How much sugar does he have left?

Xiao Fang has 56 biscuits. She wants to give them to her four friends. How many cookies can each friend get?

Xiaoming's mother gave him 50 yuan money. He bought a book and spent it on 28 yuan. How much money does he have left

Xiaohua has 68 apples. He wants to give them to his five friends. How many apples can each friend get?

operation sequence/order

1. Solution to the oral calculation problem: align two numbers bit by bit, add and subtract units, and pay attention to carry or borrow.

2. Solution to fill in the blanks: Fill in the known values in the corresponding positions, and then calculate the values in the blanks by subtraction or addition.

3. Solution of the application problem: extract the numerical value in the problem, add and subtract according to the requirements of the problem, and finally get the answer.