一个正方体的棱长和是72厘米,它的体积是 立方厘米.
=12÷ == :24= %
6÷ ==37.5%=12: =.
=12÷ =0.25=4: = %
1÷4==4: = %= (小数)
==6﹣ = ÷= 折.