When numbers have the same sign, you should __________ them.

• add

• subtract

• ignore

When numbers have different signs, you should __________ them.

• add

• subtract

• ignore

• −3 + 5

• −3 + (−5)

• 3 − 5

• −4 − (−9)

• −4 + 9

• −4 − 9

• −7.4 + (−1.2)

• −7.4 − (−1.2)

• 7.4 − 1.2

• −6 + 5

• −6 − (−5)

• −6 + (−5)

Identify the equation that has the same sign.

• • −4 − (−4) = ?

• −4 + 7 = ?

• −4 − 4 = ?

• −4 + 0 = ?

Identify the equation that has the same sign.

• • −8 − 4 = ?

• −8 + 4 = ?

• 8 − 4 = ?

Identify the equation that has the same sign.

• • −12 + 4 = ?

• 20 − 10 = ?

• −18 − 2 = ?

Identify the equation that has the same sign.

• • −1.8 + 4.0 = ?

• 7.2 − 8.4 = ?

• −2.6 − 1.3 = ?