27 faces 1 topic 1/3, 3/4, 4/9, 1/3, 1/2, 3/4 (horizontally)

20 faces (1)v=abh

=50x40x30

=60000 (cubic centimeter) =60 (cubic decimeter) =60 (liter)

(2)S table =(ab+ah+bh)x2

=(50x40+50x30+40x30)

=9400 (square centimeter)

(3)60 divided by 10=6 (km)

23 questions are calculated by yourself.

1 question 3 1, 3/ 12, 5/ 12, 1/3,1/5,3/5,65438 on the plane.

40 faces, 1 question, think for yourself.

Both questions are X.

Question 3: Think independently.

Your homework is different from mine, isn't it? Many don't match.