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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 98-23
    Solution:
    98-23 = 75
    Column vertical calculation:

			9	8
➖			2	3
			7	5

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 74-21
    Solution:
    74-21 = 53
    Column vertical calculation:

			7	4
➖			2	1
			5	3

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 26+13
    Solution:
    26+13 = 39
    Column vertical calculation:

			2	6
➕			1	3
			3	9

[4/7 Formula]
    Work: Calculate the value of equation 9.8+22 .
    Question type: Mathematical calculation
    Solution:
          9.8+22
        =31.8
    Answer:9.8+22=31.8
[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 96-47
    Solution:
    96-47 = 49
    Column vertical calculation:

			1
			9	6
➖			4	7
			4	9

[6/7 Formula]
    Work: Calculate the value of equation 26.6+1.8 .
    Question type: Mathematical calculation
    Solution:
          26.6+1.8
        =28.4
    Answer:26.6+1.8=28.4
[7/7 Formula]
    Work: Calculate the value of equation 1.7+44.1 .
    Question type: Mathematical calculation
    Solution:
          1.7+44.1
        =45.8
    Answer:1.7+44.1=45.8

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>>注：本次最多计算 7 道题。

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