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: 95-29
    Solution:
    95-29 = 66
    Column vertical calculation:

			1
			9	5
➖			2	9
			6	6

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 100-71
    Solution:
    100-71 = 29
    Column vertical calculation:

			1	1
			1	0	0
➖				7	1
			0	2	9

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 83-67
    Solution:
    83-67 = 16
    Column vertical calculation:

			1
			8	3
➖			6	7
			1	6

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 100-12
    Solution:
    100-12 = 88
    Column vertical calculation:

			1	1
			1	0	0
➖				1	2
			0	8	8

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 93-78
    Solution:
    93-78 = 15
    Column vertical calculation:

			1
			9	3
➖			7	8
			1	5

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 85-17
    Solution:
    85-17 = 68
    Column vertical calculation:

			1
			8	5
➖			1	7
			6	8

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 46-7
    Solution:
    46-7 = 39
    Column vertical calculation:

			1
			4	6
➖				7
			3	9

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>>注：本次最多计算 7 道题。

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