Overview: 7 questions will be solved this time.Among them
           ☆6 arithmetic calculations
           ☆1 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 1+2
    Solution:
    1+2 = 3
    Column vertical calculation:

			1
➕			2
			3

[2/7 Formula]
    Work: Calculate the value of equation 1+2+3 .
    Question type: Mathematical calculation
    Solution:
          1+2+3
        =3+3
        =6
    Answer:1+2+3=6
[3/7 Formula]
    Work: Calculate the value of equation 1+2+3+4 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4
        =3+3+4
        =6+4
        =10
    Answer:1+2+3+4=10
[4/7 Formula]
    Work: Calculate the value of equation 1+2+3+4+5 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5
        =3+3+4+5
        =6+4+5
        =10+5
        =15
    Answer:1+2+3+4+5=15
[5/7 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5+6
        =3+3+4+5+6
        =6+4+5+6
        =10+5+6
        =15+6
        =21
    Answer:1+2+3+4+5+6=21
[6/7 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6+7 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5+6+7
        =3+3+4+5+6+7
        =6+4+5+6+7
        =10+5+6+7
        =15+6+7
        =21+7
        =28
    Answer:1+2+3+4+5+6+7=28
[7/7 Formula]
    Work: Calculate the value of equation 1+2+3+4+5+6+7+8 .
    Question type: Mathematical calculation
    Solution:
          1+2+3+4+5+6+7+8
        =3+3+4+5+6+7+8
        =6+4+5+6+7+8
        =10+5+6+7+8
        =15+6+7+8
        =21+7+8
        =28+8
        =36
    Answer:1+2+3+4+5+6+7+8=36

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>>注：本次最多计算 7 道题。

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