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AKS: 4MA.D.6 measure time and objects that exist in the world to solve real-life, mathematical problems and analyze graphical displays of data to answer relevant questions (4.MDR.6).
Learning Target: I can express measurements given in larger units in terms of smaller units and smaller units in terms of a larger unit based on the idea of equivalence.
Activating Strategy
Activating Strategy
How can you think about which time interval does not belong?
What tools can you use to make sense of the different amounts of time?
How can you compare the different amounts of time?
Make a 4-square page in our math journals to answer Warm-Up questions using SLIDE 99.
Mini-Lesson
Mini-Lesson
We have learned how to express measurements given in a larger unit in terms of a smaller unit and express a smaller unit in terms of a larger unit based on the idea of equivalence for metric measurements for mass, length, and liquid volume. We have also learned how to solve problems involving units of measure.
Today, we will use that same knowledge and strategies to express equivalency for time units.
Listen as I think aloud...
Dora’s family drives 3 1/2 hours to the beach. How many minutes did they spend driving?
Before starting this problem, I need to know some basic equivalencies regarding units of time. I know that 1 hour is the same as 60 minutes, and 1 minute is the same as 60 seconds.
Notice this anchor chart for time unit equivalents:
If 1 hour is 60 minutes, then ½ of an hour is half of 60 minutes, or 30 minutes. Each additional hour is 60 minutes. One hour is 60 minutes, so 2 hours is 120 minutes. Three hours is the same as 120 + 60, or 3 x 60, or 180 minutes. Now I can add the minutes in 3 hours to the minutes in half an hour.
180 min. + 30 min. = m
180 + 30 = 210 minutes
3 ½ hours is the same as 210 minutes
Watch a learning video:
Today, we will continue with elapsed time and use a t-chart strategy to solve more real-world time problems.
Watch a learning video:
Guided Practice
Guided Practice
Now, mathematicians, it’s your turn:
When solving problems involving units of time equivalents, you can use a two-column table to help you solve the problem, just like you did when solving problems involving metric mass, length, and liquid volume.
Solve this problem with a math partner:
Practice in small groups - Complete together BEFORE your assigned rotation:
Independent Task
Independent Task
1. FRECKLE - Complete THREE Freckle Assignments each week. DUE FRIDAY. Your HIGHEST score in Targeted Practice is your weekly math grade - Click HERE for Freckle website
GRADED Targeted Practice - Current skill (5 questions; Score Goal=80% or higher)
Fact Practice - Multiplication Fact Practice
Adaptive Practice - At YOUR level
2. iREADY Math - Complete 30 minutes at your level each week
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