Galloping Greyhounds

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+