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

[1/4 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 58*98
    Solution:
    58*98 = 5684
    Column vertical calculation:

							5	8
✖							9	8
						4	6	4
					5	2	2
					5	6	8	4

[2/4 Formula]
    Work: Calculate the value of equation 178*101-178 .
    Question type: Mathematical calculation
    Solution:
          178*101-178
        =17978-178
        =17800
    Answer:178*101-178=17800
[3/4 Formula]
    Work: Calculate the value of equation 84*36+64*84 .
    Question type: Mathematical calculation
    Solution:
          84*36+64*84
        =3024+64*84
        =3024+5376
        =8400
    Answer:84*36+64*84=8400
[4/4 Formula]
    Work: Calculate the value of equation 75*99+75 .
    Question type: Mathematical calculation
    Solution:
          75*99+75
        =7425+75
        =7500
    Answer:75*99+75=7500

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