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: 49×27
    Solution:
    49×27 = 1323
    Column vertical calculation:

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

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 42×88
    Solution:
    42×88 = 3696
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 22×36
    Solution:
    22×36 = 792
    Column vertical calculation:

							2	2
✖							3	6
						1	3	2
						6	6
						7	9	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 55×56
    Solution:
    55×56 = 3080
    Column vertical calculation:

							5	5
✖							5	6
						3	3	0
					2	7	5
					3	0	8	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 89×74
    Solution:
    89×74 = 6586
    Column vertical calculation:

							8	9
✖							7	4
						3	5	6
					6	2	3
					6	5	8	6

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 38×76
    Solution:
    38×76 = 2888
    Column vertical calculation:

							3	8
✖							7	6
						2	2	8
					2	6	6
					2	8	8	8

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 57×99
    Solution:
    57×99 = 5643
    Column vertical calculation:

							5	7
✖							9	9
						5	1	3
					5	1	3
					5	6	4	3

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>>注：本次最多计算 7 道题。

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