Select all the valid Division Sign Cases

(1) Negative ÷ Positive = Negative

(2) Positive ÷ Positive = Positive

(3) Positive ÷ Negative = Negative

(4) Negative ÷ Negative = Positive

Explanation

There are four cases in this order:

1. Positive ÷ Positive = Positive (from prior experience)
2. Negative ÷ Negative = Positive (e.g. \(-12 \div (-2) = 6\))
3. Positive ÷ Negative = Negative (e.g. \(12 \div (-2) = -6\))
4. Negative ÷ Positive = Negative (e.g. \(-12 \div 2 = -6\))

Cases 1 and 2 share like signs → positive. Cases 3 and 4 share unlike signs → negative.