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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 120-15
    Solution:
    120-15 = 105
    Column vertical calculation:

				1
			1	2	0
➖				1	5
			1	0	5

[2/7 Formula]
    Work: Calculate the value of equation 4.52-3.5 .
    Question type: Mathematical calculation
    Solution:
          4.52-3.5
        =1.02
    Answer:4.52-3.5=1.02
[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 66+5
    Solution:
    66+5 = 71
    Column vertical calculation:

			6	6
➕			1	5
			7	1

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 117+2
    Solution:
    117+2 = 119
    Column vertical calculation:

			1	1	7
➕					2
			1	1	9

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 129-52
    Solution:
    129-52 = 77
    Column vertical calculation:

			1
			1	2	9
➖				5	2
			0	7	7

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 59+25
    Solution:
    59+25 = 84
    Column vertical calculation:

			5	9
➕			21	5
			8	4

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 67+33
    Solution:
    67+33 = 100
    Column vertical calculation:

			6	7
➕		1	31	3
		1	0	0

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>>注：本次最多计算 7 道题。

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