9514 1404 393
Answer:
Step-by-step explanation:
This is to help you learn to take advantage of the distributive property and the fact that multiplication can simplify repeated addition.
The numbers to be added include ...
- 3 values that are -7
- 4 values that are -8
- 3 values that are 11
This means we can add 11 and -7, and multiply the result by 3. It also means we can multiply -8 by 4. The sum of these products will be the same as the sum of the original 10-number set.
3(11 -7) +4(-8) = 3(4) -32 = 12 -32 = -20
