Underestimate
If you have rounded up, it will be an overestimate. If you have rounded down, it will be an underestimate.
It's an overestimate. The actual total is 1.61
Since the exact answer is 1.61, 2 is larger than 1.61 and hence an overestimate.
19.3333
Advantages and disadvantages of overestimate and underestimate
Underestimate
overestimate
Most people would estimate that as 6 (an overestimate) - 4 (an underestimate) which would estimate the answer as 2, which is an overestimate.
If you have rounded up, it will be an overestimate. If you have rounded down, it will be an underestimate.
overestimate
To estimate too highly; to overvalue., An estimate that is too high; as, an overestimate of the vote.
79.5
If you rounded up, it's an overestimate, if you rounded down, it's an underestimate. If you did both, whatever you did more of will prevail.
You know when to overestimate when the last number is over five then you round it up. Under is the last number below five you round down.
If someone were to overestimate or underestimate based on how it would make them feel, they would certainly overestimate their wealth and underestimate their weight. But for what's most helpful depends on what one is calculating. It's best to underestimate one's income so they can enjoy a little extra without fearing debt. It's best to overestimate one's spending for the same reason.
It's an overestimate. The actual total is 1.61