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: 987+799
    Solution:
    987+799 = 1786
    Column vertical calculation:

			9	8	7
➕		1	71	91	9
		1	7	8	6

[2/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 457+368
    Solution:
    457+368 = 825
    Column vertical calculation:

			4	5	7
➕			31	61	8
			8	2	5

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 342+274
    Solution:
    342+274 = 616
    Column vertical calculation:

			3	4	2
➕			21	7	4
			6	1	6

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 258+553
    Solution:
    258+553 = 811
    Column vertical calculation:

			2	5	8
➕			51	51	3
			8	1	1

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 445+369
    Solution:
    445+369 = 814
    Column vertical calculation:

			4	4	5
➕			31	61	9
			8	1	4

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 597+324
    Solution:
    597+324 = 921
    Column vertical calculation:

			5	9	7
➕			31	21	4
			9	2	1

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 385+247
    Solution:
    385+247 = 632
    Column vertical calculation:

			3	8	5
➕			21	41	7
			6	3	2

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>>注：本次最多计算 7 道题。

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