Converting Units of Time: PowerPoint Presentation

Master time conversions: hours, minutes, seconds with detailed slides and visual aids.

Slide 1: Introduction to Time Conversions
What Are Time Units?

Time Units: Ways to measure how long something takes

  • Seconds - for very short times
  • Minutes - for medium times
  • Hours - for longer times
  • Days - for full periods

Goal: Learn to change from one unit to another!

1 Example: Hours to Minutes
Example
How many minutes are in 2 hours?
Given
2 hours
Conversion
× 60
Result
120 minutes
2 hours = 120 minutes
Slide 2: Key Relationships
⏰ TIME RELATIONSHIPS ⏰
Important Facts
SECONDS
60
= 1 MINUTE
MINUTES
60
= 1 HOUR
HOURS
24
= 1 DAY
DAY
HOUR
MIN
SEC
Multiply to Go Down: Larger to smaller units
Divide to Go Up: Smaller to larger units
Slide 3: Conversion Rules
🔄 CONVERSION RULES 🔄
Easy to Remember
Main Rules:

• Big to Small: Multiply by 60 (Hours → Minutes → Seconds)

• Small to Big: Divide by 60 (Seconds → Minutes → Hours)

• Check Your Work: Always convert back to verify

• Base 60 System: Time uses 60, not 10 like other numbers

Memory Trick: "Big to Small, Multiply" and "Small to Big, Divide"
Common Mistake: Don't use 100 - time is based on 60!
Key Terms:

Conversion: Changing from one unit to another

Factor: The number we multiply or divide by

Relationship: How two units connect

Slide 4: Practice Problems
Convert 3 hours to minutes
180 min
Convert 240 minutes to hours
4 hours
Convert 360 seconds to minutes
6 min
Convert 5 hours to minutes
300 min
Practice Problem 1
Problem A
Convert 4 hours to minutes
Solution:

4 hours × 60 minutes/hour = 240 minutes

Practice Problem 2
Problem B
Convert 300 minutes to hours
Solution:

300 minutes ÷ 60 minutes/hour = 5 hours

Questions & Answers

Question: How can I use this PowerPoint presentation effectively in my classroom?

Answer: Here are effective strategies for using this presentation:

  • Follow the Slides Sequentially: Each slide builds on the previous one
  • Engage Students: Ask questions before revealing answers
  • Use Visual Aids: Point to the diagrams and infographics
  • Practice Together: Work through examples as a class
  • Check Understanding: Pause after each concept
  • Encourage Discussion: Have students explain their thinking

Focus on building conceptual understanding before procedural fluency.

Question: How can I help my child review these concepts at home?

Answer: Here are effective home review strategies:

  • Review Slides Together: Go through the presentation as a team
  • Practice Problems: Work through the exercises together
  • Real-World Connections: Relate to daily activities
  • Flash Cards: Create cards with conversion problems
  • Games: Make it fun with timed challenges
  • Regular Review: Practice a little bit every day

Consistency and real-world connections help with retention!

Question: Why do we use 60 instead of 10 like other math problems?

Answer: Great question! Ancient people used 60 because:

  • 60 can be divided evenly by many numbers: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
  • This made sharing time easier in ancient times
  • The tradition continued for thousands of years

Think of it like pizza slices - 60 slices can be shared equally among many different group sizes, which is very convenient for time!