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

[1/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 500+500
    Solution:
    500+500 = 1000
    Column vertical calculation:

			5	0	0
➕		1	5	0	0
		1	0	0	0

[2/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 300+400
    Solution:
    300+400 = 700
    Column vertical calculation:

			3	0	0
➕			4	0	0
			7	0	0

[3/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 400+400
    Solution:
    400+400 = 800
    Column vertical calculation:

			4	0	0
➕			4	0	0
			8	0	0

[4/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 900-500
    Solution:
    900-500 = 400
    Column vertical calculation:

			9	0	0
➖			5	0	0
			4	0	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 800-400
    Solution:
    800-400 = 400
    Column vertical calculation:

			8	0	0
➖			4	0	0
			4	0	0

[6/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 800-300
    Solution:
    800-300 = 500
    Column vertical calculation:

			8	0	0
➖			3	0	0
			5	0	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 220+300
    Solution:
    220+300 = 520
    Column vertical calculation:

			2	2	0
➕			3	0	0
			5	2	0

---

>>注：本次最多计算 7 道题。

Your problem has not been solved here? Please go to the Hot Problems section！