Final answer:
The question pertains to Mathematics at the High School level, focusing on rational numbers and significant figures. Answers to the sample problems are 59.4, 1.011, and 13.2, each rounded to respect significant figure rules.
Step-by-step explanation:
The subject of this question is Mathematics, specifically focusing on the operations with rational numbers and the application of rules for significant figures in calculations. The grade level of this question is likely High School since it deals with mathematical concepts typically covered at that education level. To answer the sample questions regarding significant figures:
- 56.0 + 3.44 would result in 59.44. However, since the least number of decimal places in the numbers being added is one (from 56.0), the answer should be rounded to one decimal place, giving us 59.4.
- 0.00665 + 1.004 results in 1.01065. The least number of decimal places is three (from 1.004), so the answer is rounded to 1.011.
- 45.99 - 32.8 yields 13.19. Here, since the least precise measurement is to the nearest tenth (from 32.8), the answer should be rounded to one decimal place, leaving us with 13.2.
Each calculation respects the rule that the result should be reported with the same number of decimal places as the least precise measurement.