Question

18.088+23.03 significant digits

Answer 1

`\large \boxed {41.12}`

Step-by-step explanation:

When adding or subtracting values, you must round your answer to the same "place" as the measurement with its last significant figure furthest to the left.

That is, you round off to the same number of decimal places as the measurement with the fewest decimal places.

`\begin{array}r18.08&8 \\+23.03&\\\mathbf{41.11} &\mathbf{8}\\\end{array}`

The measurement of 23.03 has two digits after the decimal point, so you round the sum to have two digits to the right of the decimal.

The number to be dropped (8) is greater than 5, so you increase the last significant figure by one (you round up).

`\text{The sum is $\large \boxed {\mathbf{{41.12}}}$}`