Performance Stations in Math
Numbers & Operations
Grade 7 - Part 2

by
Liliane Gauthier
Teacher / Educational Consultant
Saskatoon Board of Education


 
28. Numbers & Operations
Decimals: Grade 7

N-61

   Materials:
  ruler
  paper
 
1.Use a number line to put each of the following sets of numbers in order of increasing size:
 a)  12.1897  12.1  12.0954  12.897
 b)  0.0012  0.0120  0.1200  1.200
2.How can you quickly put the following sets of numbers in order of increasing size without using manipulatives or a number line?
 a)  3.0124  12.0124  1000.0124  189.0124
 b)  309.222  309.22  309.2222
 c)  45.4000  45.4130  45.4100  45.4136
3.A friend of yours says that the following numbers are in order of increasing size because they are placed in order of increasing number of digits. Write him a letter (using correct letter format) to explain to him why his reasoning does not always work. In which case does it work?

Make up an envelope (use correct format) and place your letter in the envelope.

23.1113   23.113   23.13
 

 
32. Numbers & Operations
Decimals: Grade 7

N-9. N-10. N-12
N-66, N-76

   Materials:
  calculator
 
1.Julie's mother is buying some fabric to make her a dress. She has $25.00. She needs 1.7 m. The fabric she chooses costs $16.00 a metre. How much will the fabric cost?
 a)Estimate the cost of the fabric.
Explain your strategy.
 b)Which mental calculation strategies could you use?
 c)Use a paper and pencil to show your work to calculate the exact cost.
 d)Use a calculator to determine if she has enough money.
Write in order, the keys that you used.
 e)Discuss the advantages and disadvantages of each of the above methods.
 f)Which method are you likely to use if you have $35.00 to spend?
  i)at home the night before the actual purchase
  ii)at the store at the time of the purchase
  iii)in the car on the way to the store


Return to Math Central

To return to the previous page use your browser's back button.