Webinars SET B - Grade 3-4 - Sunday@3:15-4:15pm EST-Recording Webinar 8

Video Transcription

Video Summary

This webinar (Math Kangaroo Level 3–4, Set B #8) focuses on solving time, clock, and calendar word problems. It begins with a warm-up timeline question, showing that if a train leaves in 3.5 hours and Paul woke 2.5 hours ago, he woke 6 hours before departure.<br /><br />The instructor reviews key time/calendar facts and conversions: 12 months in a year (know them in order), 24 hours in a day, 60 minutes per hour, 60 seconds per minute, 7 days per week, and typical month lengths (including a “knuckle trick” for 30/31-day months). Students practice reading analog clocks and using calendars like tables.<br /><br />Several problems are solved using polls and multiple strategies:  <br />- A 90-minute movie starting at 5:10 p.m. with two commercial breaks (8 and 5 minutes) ends at 6:53 p.m.  <br />- A dad’s birthday 55 days after a Sunday falls on Saturday (use multiples of 7).  <br />- Scheduling five stove dishes on two burners leads to a minimum total cooking time of 75 minutes by starting the longest dishes first.  <br />- A fictional “Kangaroo” calendar problem finds 30 Kang weeks in one quarter-year.  <br />- A travel-time problem determines Zoe left at 7:20 to arrive at 7:45 given she takes 12 minutes less than Mary.  <br />- Roman numerals are reviewed; MMVII is 2007, so John is X (10) on March 16, 2017.  <br />- A setup problem converts awake time in December into minutes using parentheses and correct units.<br /><br />Bonus problems include interpreting hand positions on clocks (Mary was away 6 hours) and a messenger-speed problem showing consecutive arrivals are 90 minutes apart. The session ends emphasizing flexible problem-solving strategies and checking units.

Keywords

Math Kangaroo Level 3-4

time word problems

clock reading

calendar calculations

time conversions

elapsed time

scheduling optimization

Roman numerals

timeline reasoning

unit checking