Question

fill in the blanks below. (a) alan received 80 dollars. write a signed number to represent this change. (b) a hibernating animal lost 2 pounds. write a signed number to represent this weight change.

Explanation:

Step1: Understand gain as positive

Receiving money is a gain. So for Alan receiving 80 dollars, the signed - number is positive.
+80

Step2: Understand loss as negative

An animal losing weight is a decrease. So for an animal losing 2 pounds, the signed - number is negative.

• 2

Answer:

(a) +80
(b) -2