Add, Subtract, Multiply Rational 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

Solve. Rules:

Same sign: add and keep

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

Solve. Rules:

Same sign: add and keep the sign

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

Solve. Rules:

Same sign: add and keep the sign

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

Solve. Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Solve. Hint: Change the fraction to a decimal first.

Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Hint: leave them as fractions and multiply.

Solve. Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Hint: Change the fractions to decimals first.

Rules:

Same sign: add and keep the sign

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

Solve. Rules for multiplying:

Negative x Negative = Positive

Negative x Positive = Negative

Hint: Get a common denominator first (least common multiple).