Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×18
    Solution:
    16×18 = 288
    Column vertical calculation:

							1	6
✖							1	8
						1	2	8
						1	6
						2	8	8

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×31
    Solution:
    26×31 = 806
    Column vertical calculation:

							2	6
✖							3	1
							2	6
						7	8
						8	0	6

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×16
    Solution:
    42×16 = 672
    Column vertical calculation:

							4	2
✖							1	6
						2	5	2
						4	2
						6	7	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 18×16
    Solution:
    18×16 = 288
    Column vertical calculation:

							1	8
✖							1	6
						1	0	8
						1	8
						2	8	8

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×22
    Solution:
    26×22 = 572
    Column vertical calculation:

							2	6
✖							2	2
							5	2
						5	2
						5	7	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×26
    Solution:
    16×26 = 416
    Column vertical calculation:

							1	6
✖							2	6
							9	6
						3	2
						4	1	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 36×11
    Solution:
    36×11 = 396
    Column vertical calculation:

							3	6
✖							1	1
							3	6
						3	6
						3	9	6

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>>注：本次最多计算 7 道题。

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