Final answer:
The correct rule about the sign of the quotient of positive and negative decimals is 'negative+negative-positive'. When we divide a positive decimal by a negative decimal or a negative decimal by a positive decimal, the quotient is negative.
Step-by-step explanation:
The correct rule about the sign of the quotient of positive and negative decimals is "negative+negative-positive".
When we divide a positive decimal by a negative decimal, the quotient is negative. For example, 3 ÷ (-2) = -1.5.
Similarly, when we divide a negative decimal by a positive decimal, the quotient is also negative. For example, (-6) ÷ 4 = -1.5.