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: 77+16
    Solution:
    77+16 = 93
    Column vertical calculation:

			7	7
➕			11	6
			9	3

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 97-64
    Solution:
    97-64 = 33
    Column vertical calculation:

			9	7
➖			6	4
			3	3

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 77-47
    Solution:
    77-47 = 30
    Column vertical calculation:

			7	7
➖			4	7
			3	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 95-19
    Solution:
    95-19 = 76
    Column vertical calculation:

			1
			9	5
➖			1	9
			7	6

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 93-69
    Solution:
    93-69 = 24
    Column vertical calculation:

			1
			9	3
➖			6	9
			2	4

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 75+15
    Solution:
    75+15 = 90
    Column vertical calculation:

			7	5
➕			11	5
			9	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 40+19
    Solution:
    40+19 = 59
    Column vertical calculation:

			4	0
➕			1	9
			5	9

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>>注：本次最多计算 7 道题。

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