Lesso n Ch eck
Do y o u k n o w H OW? Do y o u UN DERSTA N D? ^ PRACTICES
1. W hich is th e b etter buy, 6 bagels for $3.29 or 8 bagels @ V o c a b u l a r y Tell whether each rate is a unit rate.
for$4.15. 5. 20mievery3h 6. 2 dollars p er day- W hat is 7 lb 4 oz converted to ounces?
- W hich is longer, 12 m or 13 yd? 7 ’ Reasonin9 Does multiplying by a conversion factor
change th e a m o u n t of w h at is being m easured? How - A car is traveling at 55 m i /h. W hat is th e c a r’s speed do you know?
in feet p er second?
8. R e a s o n i n g If you convert p o u n d s to ounces, will the
n u m b e r of ounces b e greater or less th a n th e n u m b er
of pounds? Explain.
Pr act i ce an d Pr o b l em - So l v i n g Ex er ci ses praoIces
Q Practice 9. Running Trisha ran 10 km in 2.5 h. Jason ran 7.5 km in 2 h. Olga ra n 9.5 km See Problem 1.
in 2.25 h. W ho h ad th e fastest average speed?
- Population Bellingham, W ashington, h a d a n area of 25.4 m i 2 an d a p o pulation
of 74,547 during one year. Bakersfield, California, h a d a n area of 113.1 m i 2 an d a
p o pulation of 295,536 during th e sam e year. W hich city h a d a greater n u m b e r of
people p e r square mile?
Convert the given amount to the given unit. See Problems 2 and 3.
11. 63 yd; feet 12. 168 h; days 13.- 200 cm ; m eters 15. 4 m in; seconds 16.
- 9 yd; m e te rs 18.5 kg; p o u n d s 19.
- 3 qt; liters 21. 89 cm; inches 22.
- Maintenance The jan ito r at a school discovered a slow leak in a pipe. The jan ito r jp See Problem 4.
found th a t it was leaking at a rate of 4 fl oz p e r m inute. How fast was th e pipe
leaking in gallons p e r hour? - Shopping Mr. Swanson bo u g h t a package of 10 disposable razors for $6.30. He
found th at each razor lasted for 1 week. W hat was th e cost p er day?
Apply Copy and complete each statement.- 7ft 3 in. = B in. 26. 2. 2 kg=B lb
- 2.5 h = B m in 28. 2 q t/ m in = B g a l/s
- 75 c e n ts /h = B d o lla rs /d a y 30. 60 f t/s = k m /h
G
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