2. VARIABLES AND EXPRESSIONS NUMERICAL EXPRESSION A NAME FOR A NUMBER VARIABLE OR ALGEBRAIC EXPRESSION AN EXPRESSION THAT CONTAINS AT LEAST ONE VARIABLE (LETTER)

3. EVALUATING NUMERIC EXPRESSIONS (300 – 50) + 100 = 250 + 100 = 350

4. EVALUATING NUMERIC EXPRESSIONS 18 + (17 – 9) = 18 + 8 = 26

5. EVALUATING NUMERIC EXPRESSIONS (27 + 6) - 19 = 33 - 19 = 14

6. EVALUATING VARIABLE EXPRESSIONS N + 7 FOR N=9 = N + 7

7. EVALUATING VARIABLE EXPRESSIONS N + 7 FOR N=9 = + 79 = 16

8. EVALUATING VARIABLE EXPRESSIONS A + (13 – 8) FOR A = 6 = A + (13 – 8)

9. EVALUATING VARIABLE EXPRESSIONS A + (13 – 8) FOR A = 6 = + (13 – 8)6 = 11 = 6 + 5

10. EVALUATING VARIABLE EXPRESSIONS (A + B) – 10 FOR A = 8 AND B = 9 = (A + B) – 10

11. EVALUATING VARIABLE EXPRESSIONS (A + B) – 10 FOR A = 8 AND B = 9 = ( + ) – 108 9 = 17 - 10 = 7

12. EVALUATING VARIABLE EXPRESSIONS AB FOR A = 9 AND B = 7 = AB

13. EVALUATING VARIABLE EXPRESSIONS AB FOR A = 9 AND B = 7 = X9 7 = 63

14. RECAP NUMERICAL EXPRESSION A NAME FOR A NUMBER VARIABLE OR ALGEBRAIC EXPRESSION AN EXPRESSION THAT CONTAINS AT LEAST ONE VARIABLE (LETTER) TO SOLVE A NUMERIC EXPRESSION …… SIMPLIFY TO SOLVE AN ALGEBRAIC EXPRESSION ….. FIRST SUBSTITUTE THEN SIMPLIFY