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: 81-70
    Solution:
    81-70 = 11
    Column vertical calculation:

			8	1
➖			7	0
			1	1

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 64-4
    Solution:
    64-4 = 60
    Column vertical calculation:

			6	4
➖				4
			6	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 45-20
    Solution:
    45-20 = 25
    Column vertical calculation:

			4	5
➖			2	0
			2	5

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 67-7
    Solution:
    67-7 = 60
    Column vertical calculation:

			6	7
➖				7
			6	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 89-18
    Solution:
    89-18 = 71
    Column vertical calculation:

			8	9
➖			1	8
			7	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 35-24
    Solution:
    35-24 = 11
    Column vertical calculation:

			3	5
➖			2	4
			1	1

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-53
    Solution:
    96-53 = 43
    Column vertical calculation:

			9	6
➖			5	3
			4	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！