Rational Number Operations

Rational Number Operations

Adding, Subtracting, Multiplying & Dividing

Comparing Fractions

• Find a common denominator

• Rewrite each fraction with the same denominator

• Order the numerators

Poll

Make a prediction: Which fraction is bigger?

• 1/3

• 2/7

• They are equal

Compare the Fractions

Find the common denominator, then compare the numerators.

Was your prediction correct?

Multiple Choice

6/10 ____ 2/5

• >

• <

• =

Poll

Predict which rational number is larger

• 0.45

• 4/5

• They are equal

Compare Fractions with Decimals

• Turn the fraction into a decimal OR change the decimal to a fraction.

• To compare decimals, make sure you have the same place values.

Multiple Choice

Compare the two numbers:

7/8 ____ .9

• <

• >

• =

Multiple Choice

Compare 2/5 to 0.2

• <

• >

• =

Adding & Subtracting Rational Numbers

Change the fraction to a decimal, or a decimal to a fraction. (I recommend decimals). Then add or subtract as shown.

How do you change a fraction to a decimal? For example: 3/10

Fill in the Blank

1/2 + 0.5

Multiplying & Dividing Rational Numbers

Change the fraction to a decimal, or a decimal to a fraction. (I recommend fractions). Then multiply or divide as shown.

How do you change a decimal to a fraction? For example: 0.85

Fill in the Blank

 $\frac{2}{5}\div0.1$