Answer:
Four hundredths
In standard form -

Explanation:
Given : The green darner is one of the largest dragonflies.
It weighs about four hundredths of an ounce.
To write : Four hundredths in standard form.
Solution :
Standard form is when we write a larger number in a smaller way.
For example :

So, according to question
Largest dragonflies weighs about four hundredths of an ounce.
Four hundredths means 0.04
In standard form -
