Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-30
    Solution:
    88-30 = 58
    Column vertical calculation:

			8	8
➖			3	0
			5	8

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 84-29
    Solution:
    84-29 = 55
    Column vertical calculation:

			1
			8	4
➖			2	9
			5	5

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 82-20
    Solution:
    82-20 = 62
    Column vertical calculation:

			8	2
➖			2	0
			6	2

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 68-27
    Solution:
    68-27 = 41
    Column vertical calculation:

			6	8
➖			2	7
			4	1

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 39+21
    Solution:
    39+21 = 60
    Column vertical calculation:

			3	9
➕			21	1
			6	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 19-12
    Solution:
    19-12 = 7
    Column vertical calculation:

			1	9
➖			1	2
			0	7

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 40-27
    Solution:
    40-27 = 13
    Column vertical calculation:

			1
			4	0
➖			2	7
			1	3

---

>>注：本次最多计算 7 道题。

Your problem has not been solved here? Please go to the Hot Problems section！