一块长方体钢板,长2.5米,宽2.5分米,厚0.8厘米.它的体积是多少立方分米?2.5米=25分米0.8厘米=0.08分米25×2.5×0.08=25×(2.5×0.08)=25×0.2=5立方分米
5