If 0.61 is added to 167 with due regard to significant figures, then we get:

Explanation

In terms of significant figures, when adding 0.61 to 167:167 + 0.61 = 167.61The number 0.61 has two significant figures, and 167 has three significant figures. When adding these numbers together, the least number of decimal places in the original numbers determines the precision of the result.Therefore, considering significant figures, the result of adding 0.61 to 167 would be 167.61.