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

[1/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 720-200
    Solution:
    720-200 = 520
    Column vertical calculation:

			7	2	0
➖			2	0	0
			5	2	0

[2/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 700-80
    Solution:
    700-80 = 620
    Column vertical calculation:

			1
			7	0	0
➖				8	0
			6	2	0

[3/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 460-200
    Solution:
    460-200 = 260
    Column vertical calculation:

			4	6	0
➖			2	0	0
			2	6	0

[4/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 520+50
    Solution:
    520+50 = 570
    Column vertical calculation:

			5	2	0
➕				5	0
			5	7	0

[5/7 Integer column vertical calculation]
    Question type: Integer subtraction
    Original question: 400-180
    Solution:
    400-180 = 220
    Column vertical calculation:

			1
			4	0	0
➖			1	8	0
			2	2	0

[6/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 680+300
    Solution:
    680+300 = 980
    Column vertical calculation:

			6	8	0
➕			3	0	0
			9	8	0

[7/7 Integer column vertical calculation]
    Question type: Integer addition
    Original question: 720+300
    Solution:
    720+300 = 1020
    Column vertical calculation:

			7	2	0
➕		1	3	0	0
		1	0	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！