Overview: 7 questions will be solved this time.Among them
           ☆3 arithmetic calculations
           ☆4 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 29×99
    Solution:
    29×99 = 2871
    Column vertical calculation:

							2	9
✖							9	9
						2	6	1
					2	6	1
					2	8	7	1

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 85×98
    Solution:
    85×98 = 8330
    Column vertical calculation:

							8	5
✖							9	8
						6	8	0
					7	6	5
					8	3	3	0

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 125×79
    Solution:
    125×79 = 9875
    Column vertical calculation:

							1	2	5
✖								7	9
						1	1	2	5
						8	7	5
						9	8	7	5

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 25×39
    Solution:
    25×39 = 975
    Column vertical calculation:

							2	5
✖							3	9
						2	2	5
						7	5
						9	7	5

[5/7 Formula]
    Work: Calculate the value of equation 83+83×99 .
    Question type: Mathematical calculation
    Solution:
          83+83×99
        =83+8217
        =8300
    Answer:83+83×99=8300
[6/7 Formula]
    Work: Calculate the value of equation 56+56×99 .
    Question type: Mathematical calculation
    Solution:
          56+56×99
        =56+5544
        =5600
    Answer:56+56×99=5600
[7/7 Formula]
    Work: Calculate the value of equation 99×99+99 .
    Question type: Mathematical calculation
    Solution:
          99×99+99
        =9801+99
        =9900
    Answer:99×99+99=9900

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>>注：本次最多计算 7 道题。

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