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: 82-49
    Solution:
    82-49 = 33
    Column vertical calculation:

			1
			8	2
➖			4	9
			3	3

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 76-34
    Solution:
    76-34 = 42
    Column vertical calculation:

			7	6
➖			3	4
			4	2

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-25
    Solution:
    96-25 = 71
    Column vertical calculation:

			9	6
➖			2	5
			7	1

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 29-29
    Solution:
    29-29 = 0
    Column vertical calculation:

			2	9
➖			2	9
			0	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 93-54
    Solution:
    93-54 = 39
    Column vertical calculation:

			1
			9	3
➖			5	4
			3	9

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 59-13
    Solution:
    59-13 = 46
    Column vertical calculation:

			5	9
➖			1	3
			4	6

[7/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 84-22
    Solution:
    84-22 = 62
    Column vertical calculation:

			8	4
➖			2	2
			6	2

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>>注：本次最多计算 7 道题。

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