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: 129-15
    Solution:
    129-15 = 114
    Column vertical calculation:

			1	2	9
➖				1	5
			1	1	4

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 77-35
    Solution:
    77-35 = 42
    Column vertical calculation:

			7	7
➖			3	5
			4	2

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 56+5
    Solution:
    56+5 = 61
    Column vertical calculation:

			5	6
➕			1	5
			6	1

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 66+2
    Solution:
    66+2 = 68
    Column vertical calculation:

			6	6
➕				2
			6	8

[5/7 Formula]
    Work: Calculate the value of equation 78.5-51 .
    Question type: Mathematical calculation
    Solution:
          78.5-51
        =27.5
    Answer:78.5-51=27.5
[6/7 Formula]
    Work: Calculate the value of equation 71.3+5 .
    Question type: Mathematical calculation
    Solution:
          71.3+5
        =76.3
    Answer:71.3+5=76.3
[7/7 Formula]
    Work: Calculate the value of equation 6.6+3.9 .
    Question type: Mathematical calculation
    Solution:
          6.6+3.9
        =10.5
    Answer:6.6+3.9=10.5

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>>注：本次最多计算 7 道题。

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