To calculate the total weight of 5 cement blocks, you can multiply the weight of one block by the number of blocks:
\[ \text{Total weight} = \text{Weight of one block} \times \text{Number of blocks} = 0.1 , \text{kg} \times 5 = 0.5 , \text{kg} \]
So, 5 blocks weigh a total of 0.5 kilograms.