Scale Copies
A scale copy has the same shape as the original. True or False?
There are 3 red marbles and 5 blue marbles. What is the ratio of red to blue?
3:5 or 3/5
True or False. A proportion is an equation showing that two ratios are equal.
True.
Calculate 36/4 + 5
14
A notebook costs $4. How much do 3 notebooks cost?
$12
A rectangle measures 3 inches by 5 inches. If the scale factor is 2, what is the new length of the 5-inch side?
10 inches.
There are 6 boys and 4 girls. What is the ratio of boys to girls?
6:4 or 6/4
Is 2/3 = 4/6?
YES
Calculate 4.75 + 2.8
7.55
A ribbon is 24 inches long. You cut it into 3 equal pieces. How long is each piece?
8 inches.
A triangle has sides 2, 4 and 6 cm. If the scale factor is 3, what are the new side lengths?
6 cm, 12 cm, 18 cm.
A basket contains 5 apples and 7 oranges. What is the ratio of apples to the total number of fruit?
5:12 or 5/12
Solve: 3/4 = x/12
9
Calculate 2/3 x 3/4
6/12 OR 1/2
A movie ticket costs $8.50. How much will 4 tickets cost?
$34
An original rectangle measures 4 by 6 units. Its copy measures 8 by 12 unites. What is the scale factor?
2
Complete the ratio: 2:3 = 8: __
12
A recipe uses 2 cups of flour for 6 cookies. How many cups are needed for 18 cookies?
6 cups!
5/8
A recipe needs 3/4 cup of sugar. How much sugar is needed to double the recipe?
6/4 OR 1 1/2
An original rectangle measures 6 by 9 units. Its copy measures 2 by 3 units. What is the scale factor?
1/3
The ratio of cats to dogs is 2:3. If there are 10 cats, how many dogs are there?
15 dogs.
A car travels 120 miles in 2 hours. At the same speed, how far will it travel in 5 hours?
300 miles
Solve: 5/6 divided by 2/3
15/12
A store sells 3 notebooks for $7.50. At the same rate, how much would 8 notebooks cost?
$20