Name: 
 

Try It Out -- Chapter 10, Lesson 8


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Christopher and Tamer play a guessing game. Christopher thought of a number and told Tamer the answer to the question was 15. Christopher showed Tamer the steps he took to get the answer.

gr5_ch10_les8_files/i0020000.jpg

Order the steps Tamer takes to find the original number.
a.
He added 9.8 + 1.2 = 11
b.
He multiplied 14.7 X 4 = 58.8.
c.
Tamer decided to work backward to calculate the original number.
d.
He divided 58.8 ¸ 6 = 9.8..
e.
He multiplied 11 X 8 = 88.
f.
He subtracted 15 - 0.3 = 14.7.
 

 1. 
What is Tamer’s first step?
 

 2. 
What is his second step?
 

 3. 
What is his third step?
 

 4. 
What is his fourth step?
 

 5. 
What is his fifth step?
 

 6. 
What is his final step?
 
 
This time Tamer thought of a number and told Christopher the answer to the question was 20. Tamer showed Christopher the steps he took to get the answer.

gr5_ch10_les8_files/i0090000.jpg

Order the steps Christopher takes to find the original number.
a.
He subtracted 20.1 - 17 = 3.1.
b.
He added 20 + 0.1 = 20.1.
c.
He divided 12.4 ¸ 6.2 = 2.
d.
He multiplied 3.1 X 4 = 12.4
 

 7. 
What is Christopher’s first step?
 

 8. 
What is his second step?
 

 9. 
What is his third step?
 

 10. 
What is his final step?
 



 
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