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: 48-36
    Solution:
    48-36 = 12
    Column vertical calculation:

			4	8
➖			3	6
			1	2

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 80-40
    Solution:
    80-40 = 40
    Column vertical calculation:

			8	0
➖			4	0
			4	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 74-23
    Solution:
    74-23 = 51
    Column vertical calculation:

			7	4
➖			2	3
			5	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 44-23
    Solution:
    44-23 = 21
    Column vertical calculation:

			4	4
➖			2	3
			2	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 69-28
    Solution:
    69-28 = 41
    Column vertical calculation:

			6	9
➖			2	8
			4	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-66
    Solution:
    88-66 = 22
    Column vertical calculation:

			8	8
➖			6	6
			2	2

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 100-24
    Solution:
    100-24 = 76
    Column vertical calculation:

			1	1
			1	0	0
➖				2	4
			0	7	6

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>>注：本次最多计算 7 道题。

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