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

[1/4 Formula]
    Work: Calculate the value of equation 83*102-83*2 .
    Question type: Mathematical calculation
    Solution:
          83*102-83*2
        =8466-83*2
        =8466-166
        =8300
    Answer:83*102-83*2=8300
[2/4 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 98*199
    Solution:
    98*199 = 19502
    Column vertical calculation:

								9	8
✖							1	9	9
							8	8	2
						8	8	2
						9	8
					1	9	5	0	2

[3/4 Formula]
    Work: Calculate the value of equation 79*42+79+79*57 .
    Question type: Mathematical calculation
    Solution:
          79*42+79+79*57
        =3318+79+79*57
        =3318+79+4503
        =3397+4503
        =7900
    Answer:79*42+79+79*57=7900
[4/4 Formula]
    Work: Calculate the value of equation 7300/25/4 .
    Question type: Mathematical calculation
    Solution:
          7300/25/4
        =292/4
        =73
    Answer:7300/25/4=73

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