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Mental Math
Find the hourly rate of pay for
each of the following 5 questions:
                                                                         8.5
(1) $18.00 for 2 hours of work.               (7) Find 25% of 34
                                     $9.00

(2) $10.60 for 2 hours of work.      $5.30    (8) How many minutes
                                              are there in 2.75 hours?   165
(3) $21.00 for 3 hours of work.      $7.00
                                             (9) How many hours are
(4) $12.30 for 3 hours of work.      $4.10   there in 240 minutes?       4

(5) $24.80 for 4 hours of work.      $6.20
                                             (10) What is 63 x 11?       693
(6) Find 25% of 56                    14
Represent each of the following scales in two different ways.


   (a) 1:25                                  (b) 1 cm represents 6 km
A window that is 2 feet wide is drawn to 1/12 scale. How
wide is the drawing in inches?




 How wide is the drawing in inches if the scale is 1/6?
A model house has dimensions that measure 2 cm x 1 cm x 1.5 cm (width x
length x height). If the scale of the model is 1:100, what are the dimensions of
the (actual) full house?




 What is the volume of the house in the model?



 What is the volume of the actual house?



  How do the volumes compare?

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Consumer Math Slides January 7, 2008

  • 1. Mental Math Find the hourly rate of pay for each of the following 5 questions: 8.5 (1) $18.00 for 2 hours of work. (7) Find 25% of 34 $9.00 (2) $10.60 for 2 hours of work. $5.30 (8) How many minutes are there in 2.75 hours? 165 (3) $21.00 for 3 hours of work. $7.00 (9) How many hours are (4) $12.30 for 3 hours of work. $4.10 there in 240 minutes? 4 (5) $24.80 for 4 hours of work. $6.20 (10) What is 63 x 11? 693 (6) Find 25% of 56 14
  • 2. Represent each of the following scales in two different ways. (a) 1:25 (b) 1 cm represents 6 km
  • 3.
  • 4. A window that is 2 feet wide is drawn to 1/12 scale. How wide is the drawing in inches? How wide is the drawing in inches if the scale is 1/6?
  • 5. A model house has dimensions that measure 2 cm x 1 cm x 1.5 cm (width x length x height). If the scale of the model is 1:100, what are the dimensions of the (actual) full house? What is the volume of the house in the model? What is the volume of the actual house? How do the volumes compare?