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: 44+22
    Solution:
    44+22 = 66
    Column vertical calculation:

			4	4
➕			2	2
			6	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 79-15
    Solution:
    79-15 = 64
    Column vertical calculation:

			7	9
➖			1	5
			6	4

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 59-35
    Solution:
    59-35 = 24
    Column vertical calculation:

			5	9
➖			3	5
			2	4

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 33+11
    Solution:
    33+11 = 44
    Column vertical calculation:

			3	3
➕			1	1
			4	4

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 50-34
    Solution:
    50-34 = 16
    Column vertical calculation:

			1
			5	0
➖			3	4
			1	6

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 83-63
    Solution:
    83-63 = 20
    Column vertical calculation:

			8	3
➖			6	3
			2	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 66-57
    Solution:
    66-57 = 9
    Column vertical calculation:

			1
			6	6
➖			5	7
			0	9

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>>注：本次最多计算 7 道题。

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