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: 55×63
    Solution:
    55×63 = 3465
    Column vertical calculation:

							5	5
✖							6	3
						1	6	5
					3	3	0
					3	4	6	5

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 69×36
    Solution:
    69×36 = 2484
    Column vertical calculation:

							6	9
✖							3	6
						4	1	4
					2	0	7
					2	4	8	4

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 68×42
    Solution:
    68×42 = 2856
    Column vertical calculation:

							6	8
✖							4	2
						1	3	6
					2	7	2
					2	8	5	6

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 66×74
    Solution:
    66×74 = 4884
    Column vertical calculation:

							6	6
✖							7	4
						2	6	4
					4	6	2
					4	8	8	4

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 45×28
    Solution:
    45×28 = 1260
    Column vertical calculation:

							4	5
✖							2	8
						3	6	0
						9	0
					1	2	6	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 35×42
    Solution:
    35×42 = 1470
    Column vertical calculation:

							3	5
✖							4	2
							7	0
					1	4	0
					1	4	7	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 62×48
    Solution:
    62×48 = 2976
    Column vertical calculation:

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

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>>注：本次最多计算 7 道题。

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