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 999999*555555-222222*999999 .
    Question type: Mathematical calculation
    Solution:
          999999*555555-222222*999999
        =555554444445-222222*999999
        =555554444445-222221777778
        =333332666667
    Answer:999999*555555-222222*999999=333332666667
[2/4 Formula]
    Work: Calculate the value of equation 8+8+16+8+16+24+8+16+24+32+8+16+24+32+40 .
    Question type: Mathematical calculation
    Solution:
          8+8+16+8+16+24+8+16+24+32+8+16+24+32+40
        =16+16+8+16+24+8+16+24+32+8+16+24+32+40
        =32+8+16+24+8+16+24+32+8+16+24+32+40
        =40+16+24+8+16+24+32+8+16+24+32+40
        =56+24+8+16+24+32+8+16+24+32+40
        =80+8+16+24+32+8+16+24+32+40
        =88+16+24+32+8+16+24+32+40
        =104+24+32+8+16+24+32+40
        =128+32+8+16+24+32+40
        =160+8+16+24+32+40
        =168+16+24+32+40
        =184+24+32+40
        =208+32+40
        =240+40
        =280
    Answer:8+8+16+8+16+24+8+16+24+32+8+16+24+32+40=280
[3/4 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 111111222222*5
    Solution:
    111111222222*5 = 555556111110
    Column vertical calculation:

						1	1	1	1	1	1	2	2	2	2	2	2
✖																	5
						5	5	5	5	5	6	1	1	1	1	1	0
						5	5	5	5	5	6	1	1	1	1	1	0

[4/4 Formula]
    Work: Calculate the value of equation 38383838+47474747+38383838+47474746 .
    Question type: Mathematical calculation
    Solution:
          38383838+47474747+38383838+47474746
        =85858585+38383838+47474746
        =124242423+47474746
        =171717169
    Answer:38383838+47474747+38383838+47474746=171717169

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