A、小石块的质量:m=10g+5g+3.2g=18.2g.
B、小石块的体积:V=20ml-13ml=7ml=7cm 3.
C、小石块的密度:ρ=
m
V =
18.2g
7c m 3 =2.6g/cm 3.
故答案为:18.2;7;
m
V ;2.6.
A、小石块的质量:m=10g+5g+3.2g=18.2g.
B、小石块的体积:V=20ml-13ml=7ml=7cm 3.
C、小石块的密度:ρ=
m
V =
18.2g
7c m 3 =2.6g/cm 3.
故答案为:18.2;7;
m
V ;2.6.