Second, 1, A 2, C 3, A 4, a

3. Surface area: (2 times 2+2 times 8+2 times 8) times 2=72 Volume: 8 times 2 times 2=32.

Multiplication symbol = * Surface area: 5*5*6= 150 Volume: 5*5*5= 125.

4, 1, slightly 2,20 *15 *1.5 = 450 (m? )450m？ =450 tons

Verb (abbreviation of verb) 1, 5*8=40(㎡) 2, 8 * 5+8 * 3 * 2+3 * 5 * 2 =118m23, 3 * 5 * 8 =/kloc-0. 120m？ = 120000 liters

(Not all right)