B5T1L2: Identify Fractions Equivalent to 1/2

Find the Missing Numerator:

 $\frac{1}{2}=\ \frac{??}{22}$  

• 9

• 10

• 11

• 12

How do you know that  11 is the correct numerator (top number) for the fraction to equal 1/2 ?

 $\frac{1}{2}=\frac{11}{22}$  

• HALF of 22 is 11

• HALF of 11 is 22

• Since the other fraction is 1/2, You just copy it by putting two of the same digits to make 11/22

• I have no idea

Find the Missing Denominator:

 $\frac{1}{2}=\ \frac{16}{??}$  

• 16

• 32

• 8

• 2

How do you know that  32 is the correct denominator (bottom number) for the fraction to equal 1/2 ?

 $\frac{1}{2}=\frac{16}{32}$  

• 16  $\div$  2 =   8

• 16  $\times$   2 =  32

• Since the Fraction is 1/2, you estimate the bottom number, but make sure it has a 2 in it.

• I have no idea

Find the Missing Denominator:

 $\frac{1}{2}=\ \frac{50}{??}$  

• 20

• 30

• 50

• 100

How do you know that  100 is the correct denominator (bottom number) for the fraction to equal 1/2 ?

 $\frac{1}{2}=\frac{50}{100}$  

• 50  $\div$  2 =   25

• 50  $\times$   2 =  100

• Since the Fraction is 1/2, you estimate the bottom number, but make sure it has a 0 in it.

• I have no idea

Find the Missing Numerator:

 $\frac{1}{2}=\ \frac{??}{38}$  

• 19

• 29

• 38

• 18

How do you know that  11 is the correct numerator (top number) for the fraction to equal 1/2 ?

 $\frac{1}{2}=\frac{19}{38}$  

• HALF of  is 19 is 9.5

• HALF of 38 is 19

• Since the other fraction is 1/2, You just use a 1 in the tens place and add 1 to the denominator's ones place.

• I have no idea

Find the Missing Numerator:

 $\frac{1}{2}=\ \frac{??}{18}$  

• 1

• 8

• 9

• 18

How do you know that  9 is the correct numerator (top number) for the fraction to equal 1/2 ?

 $\frac{1}{2}=\frac{9}{18}$  

• HALF of  is 18 is 9

• HALF of 9 is 4.5

• Since the other fraction is 1/2, You just add the digits of the denominator and that gives you the numerator.

• I have no idea