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

[1/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 55+13
    Solution:
    55+13 = 68
    Column vertical calculation:

			5	5
➕			1	3
			6	8

[2/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 43+20
    Solution:
    43+20 = 63
    Column vertical calculation:

			4	3
➕			2	0
			6	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 88-93
    Solution:
    88-93 = - (93 - 88) = - 5
    Column vertical calculation:

			1
			9	3
➖			8	8
			0	5

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 92-24
    Solution:
    92-24 = 68
    Column vertical calculation:

			1
			9	2
➖			2	4
			6	8

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 69-44
    Solution:
    69-44 = 25
    Column vertical calculation:

			6	9
➖			4	4
			2	5

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 84-24
    Solution:
    84-24 = 60
    Column vertical calculation:

			8	4
➖			2	4
			6	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 45+26
    Solution:
    45+26 = 71
    Column vertical calculation:

			4	5
➕			21	6
			7	1

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>>注：本次最多计算 7 道题。

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