Multiplying Signed Numbers

Property The product of two numbers with the same sign is a positive number. The product of two numbers with opposite signs is a negative number.

Examples $( 7)( 5) = 35$ $9 \cdot ( 4) = 36$ $(1.5)(4) = 6$.

Explanation Multiplying signed numbers is simple! If two numbers have the same sign (both positive or both negative), their product is always positive—they're on the same team! If they have different signs (one positive, one negative), their product is negative because they are working against each other. Just multiply the numbers and then check the signs!