Answer: 4.234, 4.232, 4.228, 4.225
Step-by-step explanation:
When we have numbers higher than five we round up and when we have numbers below find we round down. When we have a number 5 we round up as well.
12 cm for the first one and 11.6 for the second.
Unrelated to the question, that house around number 3 gives me nostalgia of elementary school :)