Final Answer:
Units can help to check and solve problems by verifying the correctness of answers and providing a way to compare answers.
Step-by-step explanation:
Units are a powerful tool for checking and solving problems since they provide a way to measure the accuracy of the answer. By comparing the units of the answer with the unit of the problem, it can be determined if the answer is correct or not. Furthermore, units can be used to compare answers across different problems, making it easier to determine which answer is correct.
For example, when solving a problem involving a distance of two points, the answer must be in the same unit of measure as the problem. If the problem states the distance between two points is 10 miles, then the answer must also be in miles. If the answer is given in kilometers, it can be easily identified as incorrect.
Likewise, when two problems have different units of measure, units can be used to compare the answers. For example, if two problems ask for the cost of an item, one in dollars and the other in euros, then the answer in euros can be converted to dollars in order to compare the two answers.
In addition, units can be used to check the accuracy of answers. For example, when solving a problem involving two fractions, the answer must be in the same unit of measure as the problem. If the problem states the fraction is 1/3, then the answer must also be in thirds. If the answer is given in halves, the accuracy of the answer can be easily identified as incorrect.
Overall, units can be used to check and solve problems by verifying the correctness of answers and providing a way to compare answers. By comparing the units of the answer with the unit of the problem, it can be determined if the answer is correct or not. Furthermore, it can be used to compare answers across different problems, making it easier to determine which answer is correct. Additionally, it can be used to check the accuracy of answers.