Multiply to Scale
Find an equivalent ratio to 3 : 5 by multiplying by 2.
Answer: 6 : 10
Simplify 10 : 15
Answer: 2 : 3
Complete the table for 2 : 7
2 7
4 ___
14
4 notebooks cost $20.
How much do 8 notebooks cost?
Answer: $40
Find an equivalent ratio to 4 : 9 by multiplying by 3.
Answer: 12 : 27
Simplify 18 : 24
Answer: 3 : 4
Complete the table for 5 : 6
5 6
15 ___
18
2 pounds of apples cost $6.
How much do 6 pounds cost?
Answer: $18
7 : 8 = 21 : ___
Answer: 24
Simplify 21 : 35
Answer: 3 : 5
Complete the table for 8 : 12
8 12
4 ___
6
A student says:
“5 : 8 = 10 : 20.”
Is the student correct?
Answer: No
Why? 5 × 2 = 10, but 8 × 2 = 16, not 20.
Which is equivalent to 6 : 11?
A) 12 : 20
B) 18 : 33
C) 24 : 40
D) 30 : 45
B) 18 : 33
Which is the simplest form of 24 : 36?
A) 6 : 9
B) 4 : 6
C) 2 : 3
D) 12 : 18
C) 2 : 3
Complete the table:
9 4
27 ____
____ 20
12, 45
A recipe uses 4 cups of rice for 3 cups of beans.
How much rice is needed for 12 cups of beans?
Answer: 16 cups
(Scale factor = 4)