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: 6×41
    Solution:
    6×41 = 246
    Column vertical calculation:

							6
✖						4	1
							6
					2	4
					2	4	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 43×3
    Solution:
    43×3 = 129
    Column vertical calculation:

						4	3
✖							3
					1	2	9
					1	2	9

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 61×8
    Solution:
    61×8 = 488
    Column vertical calculation:

						6	1
✖							8
					4	8	8
					4	8	8

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 21×9
    Solution:
    21×9 = 189
    Column vertical calculation:

						2	1
✖							9
					1	8	9
					1	8	9

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 61×9
    Solution:
    61×9 = 549
    Column vertical calculation:

						6	1
✖							9
					5	4	9
					5	4	9

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 31×6
    Solution:
    31×6 = 186
    Column vertical calculation:

						3	1
✖							6
					1	8	6
					1	8	6

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

						1	8
✖							1
						1	8
						1	8

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>>注：本次最多计算 7 道题。

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