Question

tori loves to play doctor dolphin, a science quiz game. while playing this morning, she lost 80 points when she missed some geology questions. after lunch, she earned 420 points answering biology questions. what was the total change in toris score? points

Explanation:

Step1: Define the changes

Losing 80 points is - 80, earning 420 points is + 420.

Step2: Calculate the total change

Total change = - 80+420.
Using the rule of adding integers, - 80 + 420=420 - 80 = 340.

Answer:

340