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: 540+448
    Solution:
    540+448 = 988
    Column vertical calculation:

			5	4	0
➕			4	4	8
			9	8	8

[2/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 683+604
    Solution:
    683+604 = 1287
    Column vertical calculation:

			6	8	3
➕		1	6	0	4
		1	2	8	7

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 476+451
    Solution:
    476+451 = 927
    Column vertical calculation:

			4	7	6
➕			41	5	1
			9	2	7

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 469+412
    Solution:
    469+412 = 881
    Column vertical calculation:

			4	6	9
➕			4	11	2
			8	8	1

[5/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 225+675
    Solution:
    225+675 = 900
    Column vertical calculation:

			2	2	5
➕			61	71	5
			9	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 433+621
    Solution:
    433+621 = 1054
    Column vertical calculation:

			4	3	3
➕		1	6	2	1
		1	0	5	4

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 433+6213
    Solution:
    433+6213 = 6646
    Column vertical calculation:

				4	3	3
➕			6	2	1	3
			6	6	4	6

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>>注：本次最多计算 7 道题。

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