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: 45-3
    Solution:
    45-3 = 42
    Column vertical calculation:

			4	5
➖				3
			4	2

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 78-35
    Solution:
    78-35 = 43
    Column vertical calculation:

			7	8
➖			3	5
			4	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 97-40
    Solution:
    97-40 = 57
    Column vertical calculation:

			9	7
➖			4	0
			5	7

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 43-22
    Solution:
    43-22 = 21
    Column vertical calculation:

			4	3
➖			2	2
			2	1

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 59-11
    Solution:
    59-11 = 48
    Column vertical calculation:

			5	9
➖			1	1
			4	8

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 98-25
    Solution:
    98-25 = 73
    Column vertical calculation:

			9	8
➖			2	5
			7	3

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 86-73
    Solution:
    86-73 = 13
    Column vertical calculation:

			8	6
➖			7	3
			1	3

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>>注：本次最多计算 7 道题。

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