# How do you perform a serial dilution?

If I wanted a dilution of 1:100, I could measure out 1 mL and dilute it to 100 mL in one go. With the 1mL pipette I have the accuracy would be $\pm 0.05 m L$ at best, which is 5%
If I first measure out 10mL +-0.05=0.5% and dilute it to 100mL+-0.15=0.15% in a measuring flask, and then take 10mL+-0.05=0.5% out of this flask to another one of 100mL+-0.15=0.15% again, my total inaccuracy will be 0.5+0.15+0.5+0.15=1.3%