Respuesta :
By considering the significant figures, we can see that the sum is equal to 26.492.
How to perform the sum?
Here we want to perform the sum:
4.629 + 78.2 - 57
If we assume that the numbers are exact, then we can complete the significant figures for the third and second numbers as:
4.692 + 78.200 - 57.000
Then the sum is just:
4.692 + 78.200 - 57.000 = (4 + 78 - 57) + (0.692 + 0.800) = 56.492
If you want to learn more about significant figures:
https://brainly.com/question/24491627
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