I. Give the absolute value of the following. Write your final answer on the blank. (5 points)

1. / 23/ = _____
2. /-15/ = _____
3. /-23/ = _____
4. /(22 +9)/ = _____
5. /(-22 + 9)/ = _____

II. Simplify the following by performing the indicated operations. (10 points)
Write your answer on the blank.
1. 12 + 15 = _____
2. (-9) + (-4) = _____
3. (-2) + 10 = _____
4. 23 + (-18) = _____
5. (-2) + (-3) + (-4)= _____

6. ( 7 ) ( 6 ) = _____
7. (-5 ) (-9 ) = _____
8. (72 ) ÷ ( 6 ) = _____
9. ( -56 ) ÷ ( -4) = _____
10. (-90 ) ÷ ( 15 ) = _____