Overview: 6 questions will be solved this time.Among them
           ☆6 integer calculations

[1/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 163*42
    Solution:
    163*42 = 6846
    Column vertical calculation:

							1	6	3
✖								4	2
							3	2	6
						6	5	2
						6	8	4	6

[2/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 790*15
    Solution:
    790*15 = 11850
    Column vertical calculation:

							7	9	0
✖								1	5
						3	9	5	0
						7	9	0
					1	1	8	5	0

[3/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 508*16
    Solution:
    508*16 = 8128
    Column vertical calculation:

							5	0	8
✖								1	6
						3	0	4	8
						5	0	8
						8	1	2	8

[4/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 246*57
    Solution:
    246*57 = 14022
    Column vertical calculation:

							2	4	6
✖								5	7
						1	7	2	2
					1	2	3	0
					1	4	0	2	2

[5/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 560*70
    Solution:
    560*70 = 39200
    Column vertical calculation:

							5	6	0
✖								7	0
							0	0	0
					3	9	2	0
					3	9	2	0	0

[6/6 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 61*208
    Solution:
    61*208 = 12688
    Column vertical calculation:

								6	1
✖							2	0	8
							4	8	8
							0	0
					1	2	2
					1	2	6	8	8

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