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: 70×2
    Solution:
    70×2 = 140
    Column vertical calculation:

						7	0
✖							2
					1	4	0
					1	4	0

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 15×10
    Solution:
    15×10 = 150
    Column vertical calculation:

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

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×50
    Solution:
    16×50 = 800
    Column vertical calculation:

							1	6
✖							5	0
							0	0
						8	0
						8	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 26×20
    Solution:
    26×20 = 520
    Column vertical calculation:

							2	6
✖							2	0
							0	0
						5	2
						5	2	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 70×20
    Solution:
    70×20 = 1400
    Column vertical calculation:

							7	0
✖							2	0
							0	0
					1	4	0
					1	4	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 15×100
    Solution:
    15×100 = 1500
    Column vertical calculation:

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

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×500
    Solution:
    16×500 = 8000
    Column vertical calculation:

								1	6
✖							5	0	0
								0	0
							0	0
						8	0
						8	0	0	0

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>>注：本次最多计算 7 道题。

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