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

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×2
    Solution:
    48×2 = 96
    Column vertical calculation:

						4	8
✖							2
						9	6
						9	6

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 43×3
    Solution:
    43×3 = 129
    Column vertical calculation:

						4	3
✖							3
					1	2	9
					1	2	9

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 55×30
    Solution:
    55×30 = 1650
    Column vertical calculation:

							5	5
✖							3	0
							0	0
					1	6	5
					1	6	5	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 44×60
    Solution:
    44×60 = 2640
    Column vertical calculation:

							4	4
✖							6	0
							0	0
					2	6	4
					2	6	4	0

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 48×20
    Solution:
    48×20 = 960
    Column vertical calculation:

							4	8
✖							2	0
							0	0
						9	6
						9	6	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 43×90
    Solution:
    43×90 = 3870
    Column vertical calculation:

							4	3
✖							9	0
							0	0
					3	8	7
					3	8	7	0

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 75×60
    Solution:
    75×60 = 4500
    Column vertical calculation:

							7	5
✖							6	0
							0	0
					4	5	0
					4	5	0	0

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>>注：本次最多计算 7 道题。

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