Overview: 5 questions will be solved this time.Among them
           ☆5 integer calculations

[1/5 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 985*124
    Solution:
    985*124 = 122140
    Column vertical calculation:

								9	8	5
✖								1	2	4
							3	9	4	0
						1	9	7	0
						9	8	5
					1	2	2	1	4	0

[2/5 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 337*853
    Solution:
    337*853 = 287461
    Column vertical calculation:

								3	3	7
✖								8	5	3
							1	0	1	1
						1	6	8	5
					2	6	9	6
					2	8	7	4	6	1

[3/5 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 294*676
    Solution:
    294*676 = 198744
    Column vertical calculation:

								2	9	4
✖								6	7	6
							1	7	6	4
						2	0	5	8
					1	7	6	4
					1	9	8	7	4	4

[4/5 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 775*389
    Solution:
    775*389 = 301475
    Column vertical calculation:

								7	7	5
✖								3	8	9
							6	9	7	5
						6	2	0	0
					2	3	2	5
					3	0	1	4	7	5

[5/5 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 142*257
    Solution:
    142*257 = 36494
    Column vertical calculation:

								1	4	2
✖								2	5	7
								9	9	4
							7	1	0
						2	8	4
						3	6	4	9	4

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