(1)(35×25)-(5×5×4),
=875-100,
=775(平方厘米);
(2)(35-5×2)×(25-5×2)×5,
=(35-10)×(25-10)×5,
=25×15×5,
=1875(立方厘米);
答:这个盒子的表面积是775平方厘米;它的体积是1875立方厘米.
(1)(35×25)-(5×5×4),
=875-100,
=775(平方厘米);
(2)(35-5×2)×(25-5×2)×5,
=(35-10)×(25-10)×5,
=25×15×5,
=1875(立方厘米);
答:这个盒子的表面积是775平方厘米;它的体积是1875立方厘米.