Addition and Subtraction of Rational Numbers

What is the additive inverse (opposite) of -11?

• 11

• -11

What is the additive inverse (opposite) of 17?

• 17

• -17

What is the additive inverse (opposite) of -21?

• 21

• -21

7/11 - (-13/11)

• 6/11

• -6/11

• 20/11

• -20/11

-21.52-(-8.86)

• 12.66

• 30.38

• -30.38

• -12.66

• Change Mixed numbers into improper fractions.

• Get common denominators and equivalent fractions.

• Follow Adding Rules across the top and keep the same denominator.

• All of the above.

When ADDING a (Negative) + (Negative) =

• a POSITIVE answer.

• a NEGATIVE answer because you move further to the left on the number line.

• a million.

• a hundred and one.

• Line up decimals with the greater absolute value on top.

• Get common denominators.

• Keep - Change - Opposite

• Be rational.

• Multiply the values.

• Divide the values.

• Keep - Change - Opposite

• Make mixed numbers.

Solve the problem. HINT: the subtraction makes the second fraction negative.

Rules:

Same sign: add and keep the sign

Different signs: subtract and keep the sign of the bigger number