If tina had 4.6 gallons of water in one bucket and 2.3 gallons in another bucket, how many gallons did she have all together?

Hey!

Since it says "all together", that means you have to add both amounts.

In one bucket, she had 4.6 gallons, and in another, she had 2.3 gallons. Add 4.6 and 2.3

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this