Overview: 6 questions will be solved this time.Among them
           ☆5 arithmetic calculations
           ☆1 integer calculations

[1/6 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6+7+8+9+10+11+12+13+14+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+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+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+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+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+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =21+7+8+9+10+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =28+8+9+10+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =36+9+10+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =45+10+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =55+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =66+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =78+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =91+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =105+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =120+14+13+12+11+10+9+8+7+6+5+4+3+2+1
        =134+13+12+11+10+9+8+7+6+5+4+3+2+1
        =147+12+11+10+9+8+7+6+5+4+3+2+1
        =159+11+10+9+8+7+6+5+4+3+2+1
        =170+10+9+8+7+6+5+4+3+2+1
        =180+9+8+7+6+5+4+3+2+1
        =189+8+7+6+5+4+3+2+1
        =197+7+6+5+4+3+2+1
        =204+6+5+4+3+2+1
        =210+5+4+3+2+1
        =215+4+3+2+1
        =219+3+2+1
        =222+2+1
        =224+1
        =225
    Answer:1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1=225
[2/6 Formula]
    Work: Calculate the value of equation 999*222+333*334 .
    Question type: Mathematical calculation
    Solution:
          999*222+333*334
        =221778+333*334
        =221778+111222
        =333000
    Answer:999*222+333*334=333000
[3/6 Formula]
    Work: Calculate the value of equation 333*3*222+333*334 .
    Question type: Mathematical calculation
    Solution:
          333*3*222+333*334
        =999*222+333*334
        =221778+333*334
        =221778+111222
        =333000
    Answer:333*3*222+333*334=333000
[4/6 Formula]
    Work: Calculate the value of equation 333*666+333*334 .
    Question type: Mathematical calculation
    Solution:
          333*666+333*334
        =221778+333*334
        =221778+111222
        =333000
    Answer:333*666+333*334=333000
[5/6 Formula]
    Work: Calculate the value of equation 333*(666+334) .
    Question type: Mathematical calculation
    Solution:
          333*(666+334)
        =333*1000
        =333000
    Answer:333*(666+334)=333000
[6/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 333*1000
    Solution:
    333*1000 = 333000
    Column vertical calculation:

									3	3	3
✖								1	0	0	0
									0	0	0
								0	0	0
							0	0	0
						3	3	3
						3	3	3	0	0	0

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