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: 40+13
    Solution:
    40+13 = 53
    Column vertical calculation:

			4	0
➕			1	3
			5	3

[2/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 77+43
    Solution:
    77+43 = 120
    Column vertical calculation:

			7	7
➕		1	41	3
		1	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 76+12
    Solution:
    76+12 = 88
    Column vertical calculation:

			7	6
➕			1	2
			8	8

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 48-21
    Solution:
    48-21 = 27
    Column vertical calculation:

			4	8
➖			2	1
			2	7

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 91+29
    Solution:
    91+29 = 120
    Column vertical calculation:

			9	1
➕		1	21	9
		1	2	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 97-30
    Solution:
    97-30 = 67
    Column vertical calculation:

			9	7
➖			3	0
			6	7

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 99-63
    Solution:
    99-63 = 36
    Column vertical calculation:

			9	9
➖			6	3
			3	6

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>>注：本次最多计算 7 道题。

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