Curriculum / Math / 3rd Grade / Unit 7: Measurement / Lesson 6
Math
Unit 7
3rd Grade
Lesson 6 of 12
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Solve word problems involving all cases of elapsed time in minutes.
The core standards covered in this lesson
3.MD.A.1 — Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.
The essential concepts students need to demonstrate or understand to achieve the lesson objective
Suggestions for teachers to help them teach this lesson
While not explicitly listed in the standards aligned to this lesson, this work of solving word problems involving all cases of elapsed time in minutes (3.MD.1) connects to the work of fluently adding and subtracting within 1,000 (3.NBT.2), multiplying and dividing within 100 (3.OA.7), as well as solving one- and two-step problems involving all four operations (3.OA.8).
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Tasks designed to teach criteria for success of the lesson, and guidance to help draw out student understanding
The third-grade teachers left school on Friday to go to a movie together. It's currently 2:12 p.m. and the movie’s start time is 3:00 p.m. Here is what Google Maps told them they should do to get to the movie theater:
Will they make it in time to see the movie? Show or explain your work.
a. Joey gets home at 3:25 p.m. It takes him 7 minutes to unpack and 18 minutes to have a snack before starting his homework. What is the earliest time Joey can start his homework?
b. Shane’s family wants to start eating dinner at 5:45 p.m. It takes Shane 15 minutes to set the table and 7 minutes to help put the food out. What time should Shane start his chores so that he’ll be ready to eat at 5:45 p.m.?
c. Davis has 3 problems for math homework. He starts at 4:08 p.m. The first problem takes him 5 minutes, and the second takes him 6 minutes. If Davis finishes at 4:23 p.m., how long does it take him to solve the last problem?
Grade 3 Mathematics > Module 2 > Topic A > Lesson 5 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Problem Set
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A task that represents the peak thinking of the lesson - mastery will indicate whether or not objective was achieved
Melissa woke up this morning at the time shown on the clock below.
Colton wakes up 25 minutes later than Melissa. Gemma wakes up 18 minutes later than Colton. What time does Gemma wake up?
Ayesha spends 17 minutes on her math homework and 14 minutes on her history homework. She spends 25 minutes reading. How many more minutes does Ayesha spend on her math and history homework than she does reading? Show or explain your work.
An example response to the Target Task at the level of detail expected of the students.
The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
Extra Practice Problems
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Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.
Lesson 5
Lesson 7
Topic A: Time Measurement
Tell time to the nearest minute.
3.MD.A.1
Tell time to the minute before the hour.
Relate clocks to number lines.
Solve word problems involving elapsed time within the same hour.
Solve word problems involving elapsed time that involves crossing the hour mark.
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Topic B: Mass and Liquid Volume Measurement
Understand mass as an attribute of objects that is measured in grams and kilograms. Develop benchmarks for 1 kilogram and 1 gram.
3.MD.A.2
Estimate and measure mass in grams and kilograms by reading a measurement scale on an analog scale or other scale.
Solve word problems involving masses given in the same unit.
Understand liquid volume as an attribute of objects that is measured in liters and milliliters. Develop benchmarks for 1 liter and 1 milliliter.
Estimate and measure liquid volume in liters and milliliters by reading the measurement scale on a beaker or other container.
Solve word problems involving volumes given in the same unit.
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