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

[1/7 Formula]
    Work: Calculate the value of equation (30×25)×40 .
    Question type: Mathematical calculation
    Solution:
          (30×25)×40
        =750×40
        =30000
    Answer:(30×25)×40=30000
[2/7 Formula]
    Work: Calculate the value of equation 299×120+120 .
    Question type: Mathematical calculation
    Solution:
          299×120+120
        =35880+120
        =36000
    Answer:299×120+120=36000
[3/7 Formula]
    Work: Calculate the value of equation 38×25×4 .
    Question type: Mathematical calculation
    Solution:
          38×25×4
        =950×4
        =3800
    Answer:38×25×4=3800
[4/7 Formula]
    Work: Calculate the value of equation 48×38+2×38 .
    Question type: Mathematical calculation
    Solution:
          48×38+2×38
        =1824+2×38
        =1824+76
        =1900
    Answer:48×38+2×38=1900
[5/7 Formula]
    Work: Calculate the value of equation 91×33+99×3 .
    Question type: Mathematical calculation
    Solution:
          91×33+99×3
        =3003+99×3
        =3003+297
        =3300
    Answer:91×33+99×3=3300
[6/7 Formula]
    Work: Calculate the value of equation 289×99+12×99-99 .
    Question type: Mathematical calculation
    Solution:
          289×99+12×99-99
        =28611+12×99-99
        =28611+1188-99
        =29799-99
        =29700
    Answer:289×99+12×99-99=29700
[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 109×90
    Solution:
    109×90 = 9810
    Column vertical calculation:

							1	0	9
✖								9	0
							0	0	0
						9	8	1
						9	8	1	0

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>>注：本次最多计算 7 道题。

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