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

[1/3 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =3+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =6+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =10+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =15+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =21+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =28+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =36+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =45+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =55+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =66+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =78+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =91+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =105+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =120+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =136+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =153+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =171+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =190+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =210+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =231+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =251+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =270+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =288+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =305+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =321+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =336+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =350+13+12+11+10+9+8+7+6+5+4+3+2+1
        =363+12+11+10+9+8+7+6+5+4+3+2+1
        =375+11+10+9+8+7+6+5+4+3+2+1
        =386+10+9+8+7+6+5+4+3+2+1
        =396+9+8+7+6+5+4+3+2+1
        =405+8+7+6+5+4+3+2+1
        =413+7+6+5+4+3+2+1
        =420+6+5+4+3+2+1
        =426+5+4+3+2+1
        =431+4+3+2+1
        =435+3+2+1
        =438+2+1
        =440+1
        =441
    Answer:1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1=441
[2/3 Formula]
    Work: Calculate the value of equation 2+4+6+8+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29 .
    Question type: Mathematical calculation
    Solution:
          2+4+6+8+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =6+6+8+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =12+8+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =20+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =30+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =42+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =56+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =72+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =90+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =110+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =132+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =156+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =182+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =210+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =240-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =239-3-5-7-9-11-13-15-17-19-21-23-25-27-29
        =236-5-7-9-11-13-15-17-19-21-23-25-27-29
        =231-7-9-11-13-15-17-19-21-23-25-27-29
        =224-9-11-13-15-17-19-21-23-25-27-29
        =215-11-13-15-17-19-21-23-25-27-29
        =204-13-15-17-19-21-23-25-27-29
        =191-15-17-19-21-23-25-27-29
        =176-17-19-21-23-25-27-29
        =159-19-21-23-25-27-29
        =140-21-23-25-27-29
        =119-23-25-27-29
        =96-25-27-29
        =71-27-29
        =44-29
        =15
    Answer:2+4+6+8+10+12+14+16+18+20+22+24+26+28+30-1-3-5-7-9-11-13-15-17-19-21-23-25-27-29=15
[3/3 Formula]
    Work: Calculate the value of equation 8337*6888+4888*5333 .
    Question type: Mathematical calculation
    Solution:
          8337*6888+4888*5333
        =57425256+4888*5333
        =57425256+26067704
        =83492960
    Answer:8337*6888+4888*5333=83492960

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