Answer: 30 - (-7)
Explanation:
I like to use brackets and put all the pieces together one at a time to ensure I'm doing exactly as the question asks:
- difference ([product of (-15) and (-2)] and [sum of (-10) and (+3)])
- difference [ (-15 × -2) and (-10 + 3)]
- (-15 × -2) - (-10 + 3)
- 30 - (-7)
Remember:
difference means subtraction
product means multiplication
sum means addition