Grade Level: 3rd Skill: Problem Solving Topic: Exact vs. Approximate Answers Goal: Indicate the relative advantages of exact and approximate solutions to problems and give answers to a specified degree of accuracy. Skill Description: Mathematical Reasoning: give answers, problem solving The ability to know when an approximate answer is useful and the ability to decide when a precise answer is needed instead.

## Building Blocks/Prerequisites

### Sample Problems

 (1) Would you use an approximate or precise measurement to make a new recipe for upside down cake? (answers will vary; precise, especially the first time you make a recipe) (2) Would you use an approximate or precise level of volume for the music at the party? (answers will vary; approximate, you would give it an “ear test” and see how it sounded) (3) Why would you only use an approximate number of chips to put out for the party? (answers will vary; it doesn’t matter how many chips are out, as long as people have something to eat) (4) Why would you use a precise measurement when measuring the length of your long jump? (answers will vary; precise measurements help to track improvement or measure performance) (5) Describe your process for using approximation when feeding a meter with money while going into the store? (feed the meter with more money/time than you think it will take in the store, just to be safe)

### Online Resources

 (1) (2) (3)