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: 76-20
    Solution:
    76-20 = 56
    Column vertical calculation:

			7	6
➖			2	0
			5	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 94-52
    Solution:
    94-52 = 42
    Column vertical calculation:

			9	4
➖			5	2
			4	2

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 66-25
    Solution:
    66-25 = 41
    Column vertical calculation:

			6	6
➖			2	5
			4	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-45
    Solution:
    85-45 = 40
    Column vertical calculation:

			8	5
➖			4	5
			4	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 48-7
    Solution:
    48-7 = 41
    Column vertical calculation:

			4	8
➖				7
			4	1

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-15
    Solution:
    85-15 = 70
    Column vertical calculation:

			8	5
➖			1	5
			7	0

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 79-50
    Solution:
    79-50 = 29
    Column vertical calculation:

			7	9
➖			5	0
			2	9

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>>注：本次最多计算 7 道题。

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