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3. Add: (-31) + (-20) =____ *
4. Add: 17 + (-3) + 4 = ____ *
5. What must be subtracted from 80 to get –20? *
6. Simplify: 50 – (-25) = ____ *
7. (8)(-3) = ____ *
8. (4)(5)(-2) = ____ *
9. 120 ÷ (-12) =____ *
10. ( -175) ÷ (-25) = ____​