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Try It Out -- Chapter 9, Lesson 6: Communicate About Problem Solving


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Jack takes 250 minutes to go to and from school each week. He walks 0.2 of the time, and rides the bus for the rest of the time. How many minutes does Jack walk?

Order the steps of a solution.

a.
I must determine the number of minutes Jack spends walking.
b.
0.2 is two tenths. In the model, one tenth is a column of 25, so two tenths is 50.
c.
Jack walks for 50 min each week.
d.
Use base ten blocks to model 250 as 10 columns of 25.
 

 1. 
What is the first step?
 

 2. 
What is the second step?
 

 3. 
What is the third step?
 

 4. 
What is the fourth step?
 
 
How many minutes does Jack ride the bus?

Order the steps of a solution.

a.
I must determine the number of minutes Jack rides the bus.
b.
Check: 0.2 is the time walking, so 0.8 must be the time on the bus. 0.8 x 250 = 0.4 x 500 = 0.2 x 1000 = 200.
c.
Subtract the number of minutes walking from the total. 250 - 50 = 200.
d.
Jack rides the bus for 200 min each week.
e.
I know Jack walks for 50 min.
 

 5. 
What is the first step?
 

 6. 
What is the second step?
 

 7. 
What is the thihttps:ep?
 

 8. 
What is the fourth step?
 

 9. 
What is the final step?
 



 
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