Read and understand the question and choose the correct answer.
1.(+12) + (-20) *

2.(+264) + (+461) *

3.(+98) - (-16) *

4.(-125) + (+ 150) *

5.(- 4800) ÷ (+24) *

6.(-50) x (+5) *

7.(+278) x (+54) *

8.(-415) – (-18) *

9.(+64) ÷ (-8) *

10.(+682) + (-285) *