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

[1/4 Formula]
    Work: Calculate the value of equation 111111111+1111111+11111+111+1 .
    Question type: Mathematical calculation
    Solution:
          111111111+1111111+11111+111+1
        =112222222+11111+111+1
        =112233333+111+1
        =112233444+1
        =112233445
    Answer:111111111+1111111+11111+111+1=112233445
[2/4 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2468*1357
    Solution:
    2468*1357 = 3349076
    Column vertical calculation:

									2	4	6	8
✖									1	3	5	7
								1	7	2	7	6
							1	2	3	4	0
							7	4	0	4
						2	4	6	8
						3	3	4	9	0	7	6

[3/4 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 2424*503
    Solution:
    2424*503 = 1219272
    Column vertical calculation:

								2	4	2	4
✖									5	0	3
								7	2	7	2
							0	0	0	0
					1	2	1	2	0
					1	2	1	9	2	7	2

[4/4 Formula]
    Work: Calculate the value of equation 7723*46+7723*54 .
    Question type: Mathematical calculation
    Solution:
          7723*46+7723*54
        =355258+7723*54
        =355258+417042
        =772300
    Answer:7723*46+7723*54=772300

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