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

[1/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 20×7
    Solution:
    20×7 = 140
    Column vertical calculation:

						2	0
✖							7
					1	4	0
					1	4	0

[2/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1×80
    Solution:
    1×80 = 80
    Column vertical calculation:

							1
✖						8	0
							0
						8
						8	0

[3/3 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 20×6
    Solution:
    20×6 = 120
    Column vertical calculation:

						2	0
✖							6
					1	2	0
					1	2	0

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