Question

1. 6+-7(-8)+4-2=


2. 16-21+18-8=


3. 108+-200+9-42=

4.
46-{38-(-2)+-9+(42-18+-15)-(-7)}

Answer 1

6+7(_8)+4-2 = 48

16-21+18-8=5

108+200+9-42=275