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IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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6-8 Grade 6 Unit 3 Lesson 9

Gradeband

K-5 Math •6-8 Math 9-12 Math

Course

•Grade 6 Grade 7 Grade 8

Unit

Unit 1 Unit 2 •Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 Unit 9

Lesson

Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 •Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17

K-5
6-8
9-12

Grade 6
Grade 7
Grade 8

Accelerated 6
Accelerated 7

Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9

Lesson 1
Lesson 2
Lesson 3
Lesson 4
Lesson 5
Lesson 6
Lesson 7
Lesson 8
Lesson 9
Lesson 10
Lesson 11
Lesson 12
Lesson 13
Lesson 14
Lesson 15
Lesson 16
Lesson 17

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Unit 3, Lesson 9

More about Constant Speed (Optional)

Grade 6

Practice

Problem 1
Student Task Statement
A kangaroo hops 2 kilometers in 3 minutes. At this rate:

How long does it take the kangaroo to travel 5 kilometers?

How far does the kangaroo travel in 2 minutes?
to access Practice Problem Solutions.

Lesson 9 Resources

Student Materials

Problem 2

Student Task Statement

Mai runs around a 400-meter track at a constant speed of 250 meters per minute. How many minutes does it take Mai to complete 4 laps of the track? Explain or show your reasoning.

to access Practice Problem Solutions.

Problem 3

Student Task Statement

At 10:00 a.m., Han and Tyler both started running toward each other from opposite ends of a 10-mile path along a river. Han runs at a pace of 12 minutes per mile. Tyler runs at a pace of 15 minutes per mile.

How far does Han run after a half hour? After an hour?
Do Han and Tyler meet on the path within 1 hour? Explain or show your reasoning.

to access Practice Problem Solutions.

Problem 4

ForLesson 16: Solving More Ratio Problems

Student Task Statement

Two skateboarders start a race at the same time. Skateboarder A travels at a steady rate of 15 feet per second. Skateboarder B travels at a steady rate of 22 feet per second. After 4 minutes, how much farther will Skateboarder B have traveled? Explain your reasoning.

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Problem 5

ForLesson 3: Converting Units

Student Task Statement

There are 4 tablespoons in cup. There are 2 cups in 1 pint. How many tablespoons are there in 1 pint? If you get stuck, consider drawing a double number line diagram or making a table.

to access Practice Problem Solutions.

Problem 6

ForLesson 12: What Is Surface Area?

Student Task Statement

Two larger cubes are made out of unit cubes. Cube A is 2 by 2 by 2. Cube B is 4 by 4 by 4. The side length of Cube B is twice that of Cube A.

Is the surface area of Cube B also twice that of Cube A? Explain or show your reasoning.
Is the volume of Cube B also twice that of Cube A? Explain or show your reasoning.

Two larger cubes are made out of unit cubes. Cube A is 2 unit cubes wide, 2 unit cubes tall, and 2 unit cubes deep. Cube B is 4 unit cubes wide, 4 unit cubes tall, and 2 unit cubes deep.

to access Practice Problem Solutions.