Webinars SET B - Grades 3-4 - Sunday@3:15pm EST-Webinar 4 Recording

Video Transcription

Video Summary

In the fourth level 3-4 webinar, the focus was on solving problems using an organized list. The warm-up problem was determining how many three-digit numbers have digits summing to five, with 122 as an example. The solution technique involved making lists based on fixed-digit combinations to ensure no possibilities were missed. Participants engaged in a poll to predict outcomes before the instructor revealed the correct answers. Emphasis was placed on listing all possibilities carefully for clarity and completeness.<br /><br />The session then explored various problems that emphasize systematic listing:<br />1. Determining different combinations of animal tours with constraints.<br />2. Combining digits on cards where 6 and 9 can be flipped.<br />3. Distributing the cost of glass bells equally among packages—concluding this isn’t always feasible.<br />4. Analyzing a soccer results problem to find the impossible number of points.<br />5. Counting specific digit occurrences within a number range.<br /><br />The key takeaway was that organized lists help systematically tackle problems involving possibilities or combinations, especially when dealing with number constraints or specific conditions. Using casework or recognizing patterns aids in ensuring all scenarios are considered. Participants were reminded to approach problem-solving methodically, use appropriate strategies, and read problem statements carefully to discern when digits should be counted once or twice, exemplified in the problem involving multiple uses of the digit 5.<br /><br />Additional guidance and access to past recordings were provided for students seeking further practice and clarification on the discussed topics.

Keywords

organized lists

problem solving

three-digit numbers

digit sum

systematic listing

combinations

constraints

casework

patterns

webinar