My List that comes from my MAP function I need to get to 4 decimal places

Code:
'''
a = [5,4,6,8,9,12]
b = [3,5,3,7,4,10]
c = [4,7,7,4,10,14]
 

#Gets S List
hlist = map(add,a,b)
h2list = map(add,hlist,c)
twolist = [2,2,2,2,2,2]
s = map(truediv,h2list,twolist)


sqrtlist = [0.5,0.5,0.5,0.5,0.5,0.5]    
sa = map(sub,s,a) # (s-a)
sb = map(sub,s,b) # (s-b)
...