a) 2,5km=……m b)4,5dm^3=…..cm^3 c)245g=……kg d)m=87kg =>P=……. e)D=2700kg/m^3=>d=…….. f)720g=……kg g)0,8m=…..dm h)730cm^3=……..

Giải thích các bước giải:

a) 2,5km=2500m

b)4,5dm^3=0,45cm^3

c)245g=0,245kg

d)m=87kg =>P=870N

e)D=2700kg/m^3=>d=162kg

f)720g=0,72kg

g)0,8m=8 dm

h)730cm^3=0,73lít

i)P=13,5N=>m=135kg

j)d=89000N/m^3 =4,05N

xin hay nhất! :)))