Wed Jeopardy: Scaling/Rate

Scaling Up"Streching"

100

If I want to "double" a number, I should multiply by _______.

2

200

I doubled my recipe for cookies. Instead of 4 eggs, now I used _____ eggs.

8 eggs

300

If I want to "stretch" a square. I will multiply the original side length by a number __________ than 1.

Greater/Bigger

400

Jim multiplied his couch length by 1.5, is he scaling up (stretching) or scaling down (shrinking)?

Stretching...

 1.5 is GREATER THAN 1

500

My daughter wants me to build her a life-size table that looks just like her Barbie table in her doll house. 

The Barbie table is 3 inches long. If we multiply the length by a scale factor of 15, how long with the life-size table be?

45 in long

Scaling Down"Shrinking"

100

If I want to cut an object in half, I would multiply the original dimensions (side lengths) by _____.

.5

200

If I want to shrink an object, I should multiply the side lengths by a number __________ than 1.

Less

300

Charlie's bike is 4' long. 

She is making a bike for her pet monkey that is half as long. Show a multiplication equation that represents the story.

4 * .5 = 2'

or 4 * 1/2 = 2'

400

Marri is making 10" headbands and wants to start making toddler headbands that are 1/4 the original size. 

What decimal is she going to multiply 10 by?

.25 (think money: 1/4 of a dollar is .25 cents)

500

If we kicked out 1/3 of our class, we would have 8 students left. How many students are in our class total?

12 (if 8 = 2/3, then half of eight would = 1/3

therefore... 8 + 4 = 3/3)

Rate

100

Jimmy ties one shoe in 8 seconds. How long will it take him to tie both of his shoes at this rate?

16 seconds

200

Apples are $1.50 per lb. How much is 2 lbs of apples?

$3.00 (1.50 * 2 = 3)

300

If Jerry the slug takes 9 hrs to make it home from slug school. Ray the snail lives twice as far from the school, how long would it take Jerry to get to Ray's house from school?

18 hrs (9 * 2)

400

A pitcher runs one mile every 6 mins. Today he ran 9 miles at this constant rate, how long did it take him?

54 mins (6 * 9)

500

25 Chocolates cost $1.25. What is the rate of $ per chocolate?

$.05 per chocolate (1.25 / 25 = .05)

Fractions

100

What is the fraction form of .5?

1/2 one half

200

If I ate 1/3 of the pizza and there are 9 pieces total, how many pieces did I have?

3 pieces

(9 /3 = 3 )

300

Name the smallest fraction here:

1/2

14/20

3/10

3/10

400

Name a fraction that is equivalent to 2.0 

**Hint: fractions are just division problems**

2/1 or 4/2 or 6/3 or 8/4 or 20/10 etc...

500

Reduce the fraction 4/12

2/6 or 1/3

Math Facts

100

2 * 4 = ?

8

200

2 * _?_ = 10

5

300

3 * 7 = ?

21

400

What is half of 5?

2.5

(5 * .5  OR 5/2)

500

7.5 * __?_ = 22.5

3