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: 99-72
    Solution:
    99-72 = 27
    Column vertical calculation:

			9	9
➖			7	2
			2	7

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 102-96
    Solution:
    102-96 = 6
    Column vertical calculation:

			1	1
			1	0	2
➖				9	6
			0	0	6

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 86-65
    Solution:
    86-65 = 21
    Column vertical calculation:

			8	6
➖			6	5
			2	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 73-32
    Solution:
    73-32 = 41
    Column vertical calculation:

			7	3
➖			3	2
			4	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 99-2
    Solution:
    99-2 = 97
    Column vertical calculation:

			9	9
➖				2
			9	7

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 93-40
    Solution:
    93-40 = 53
    Column vertical calculation:

			9	3
➖			4	0
			5	3

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 83-10
    Solution:
    83-10 = 73
    Column vertical calculation:

			8	3
➖			1	0
			7	3

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>>注：本次最多计算 7 道题。

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