Galloping Greyhounds
Adding, subtracting, and multiplying fractions
1 Activity Phil owns and races a greyhound called Flash.
1. a. The rest of the prize pool goes to the third place. How much is this?
3/5 1/4 3 place is 3/20ths
3/5 is 12/20ths
b. Compare the first, second, and third prizes by writing them as a ratio.
12:5:3
2. For the following prize pools, how much would the greyhounds that come first, second, and third each earn for their owners?
a. $600 2a 3/5 x 600= 360 1/4 x 600= 150 3/2x600=510
b. $750 3/5 x 750= 450 1/4 x 750 = 187.50 3/20 x 750= 300
c. $900 2c 3/5 x 900 =540 1/4 x 900 = 225 3/20 x 900= 145
d. $1,900 2d 3/5 x 1900 = 1140 1/4 x 1900= 475 3/20 x 1900= 285
e. $2,500 3/5 x2500= 1500 1/4 x 2500= 625 3/5 x2500 = 225
The owner of a placed greyhound gives the trainer 10 percent of his prize money. Flash comes first in an $800 race. a. How much does Phil give the trainer? b. What fraction of the total prize pool is this? 3/5 800= 48 1/4 x200=3/200
4. What fraction of the total prize pool does Phil give the trainer when Flash comes: a. second? b. third? If Flash comes first, Phil gets of the prize pool; if he comes second, Phil gets . 1 4 3 5 I know that is
. That’s a start. 3 5 12 20 I’m going to split each of these amounts into 20 equal shares. Proportional Reasoning: Book One, Levels 3+–4+
