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: 26×4
    Solution:
    26×4 = 104
    Column vertical calculation:

						2	6
✖							4
					1	0	4
					1	0	4

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×3
    Solution:
    50×3 = 150
    Column vertical calculation:

						5	0
✖							3
					1	5	0
					1	5	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 21×2
    Solution:
    21×2 = 42
    Column vertical calculation:

						2	1
✖							2
						4	2
						4	2

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 34×3
    Solution:
    34×3 = 102
    Column vertical calculation:

						3	4
✖							3
					1	0	2
					1	0	2

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×40
    Solution:
    26×40 = 1040
    Column vertical calculation:

							2	6
✖							4	0
							0	0
					1	0	4
					1	0	4	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 50×30
    Solution:
    50×30 = 1500
    Column vertical calculation:

							5	0
✖							3	0
							0	0
					1	5	0
					1	5	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 21×20
    Solution:
    21×20 = 420
    Column vertical calculation:

							2	1
✖							2	0
							0	0
						4	2
						4	2	0

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>>注：本次最多计算 7 道题。

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