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: 98×52
    Solution:
    98×52 = 5096
    Column vertical calculation:

							9	8
✖							5	2
						1	9	6
					4	9	0
					5	0	9	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×66
    Solution:
    48×66 = 3168
    Column vertical calculation:

							4	8
✖							6	6
						2	8	8
					2	8	8
					3	1	6	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 69×72
    Solution:
    69×72 = 4968
    Column vertical calculation:

							6	9
✖							7	2
						1	3	8
					4	8	3
					4	9	6	8

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×93
    Solution:
    48×93 = 4464
    Column vertical calculation:

							4	8
✖							9	3
						1	4	4
					4	3	2
					4	4	6	4

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 78×89
    Solution:
    78×89 = 6942
    Column vertical calculation:

							7	8
✖							8	9
						7	0	2
					6	2	4
					6	9	4	2

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 76×39
    Solution:
    76×39 = 2964
    Column vertical calculation:

							7	6
✖							3	9
						6	8	4
					2	2	8
					2	9	6	4

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 69×54
    Solution:
    69×54 = 3726
    Column vertical calculation:

							6	9
✖							5	4
						2	7	6
					3	4	5
					3	7	2	6

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>>注：本次最多计算 7 道题。

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