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

[1/7 Formula]
    Work: Calculate the value of equation 2214+638+286 .
    Question type: Mathematical calculation
    Solution:
          2214+638+286
        =2852+286
        =3138
    Answer:2214+638+286=3138
[2/7 Formula]
    Work: Calculate the value of equation 256+228+344+212 .
    Question type: Mathematical calculation
    Solution:
          256+228+344+212
        =484+344+212
        =828+212
        =1040
    Answer:256+228+344+212=1040
[3/7 Formula]
    Work: Calculate the value of equation 3065-738-1065 .
    Question type: Mathematical calculation
    Solution:
          3065-738-1065
        =2327-1065
        =1262
    Answer:3065-738-1065=1262
[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 1999+644
    Solution:
    1999+644 = 2643
    Column vertical calculation:

			1	9	9	9
➕			1	61	41	4
			2	6	4	3

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 1883-398
    Solution:
    1883-398 = 1485
    Column vertical calculation:

				1	1
			1	8	8	3
➖				3	9	8
			1	4	8	5

[6/7 Formula]
    Work: Calculate the value of equation 2357-183-317-357 .
    Question type: Mathematical calculation
    Solution:
          2357-183-317-357
        =2174-317-357
        =1857-357
        =1500
    Answer:2357-183-317-357=1500
[7/7 Formula]
    Work: Calculate the value of equation 2365-1086-214 .
    Question type: Mathematical calculation
    Solution:
          2365-1086-214
        =1279-214
        =1065
    Answer:2365-1086-214=1065

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>>注：本次最多计算 7 道题。

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