To Start: 15 Points Evaluate: * 6 – 2 3(6 +2) – 2 3{6 +(3 * 4)}

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Presentation transcript:

To Start: 15 Points Evaluate: 3 + 4 * 6 – 2 3(6 +2) – 2 3{6 +(3 * 4)} =25 =22 =54

Chapter 1: Algebraic Expressions and Integers Section 1-3: Evaluating Expressions

Evaluating You can Evaluate a variable expression by replacing each variable with a number. Then use the order of operations to simplify.

Practice #1 28!!!! 21!!!! Evaluate the following. 63 – 5x for x=7. Substitute 7 in for x! 63 – 5(7) = ? 63 – 35 = ? 28!!!! 4y – 15 for y=9. Substitute 9 in for y! 4(9) – 15 = ? 36 – 15 = ? 21!!!!

You Try!!! 5!!!! 45!!!! Evaluate the following. 4(t+3) + 1 for t=8. Substitute 8 in for t! 4(8+3) +1= ? 4(11) + 1= ? 44 + 1 =? 45!!!! 4m – 11 for m=4. Substitute 4 in for m! 4(4) – 11 = ? 16 – 11 = ? 5!!!!

Practice #2 35!!!! Substitute for the variables! Do order of operations! Evaluate 3ab + c/2 for a=2, b=5, and c=10. 3(2)(5) + 10/2 = ? 6(5) + 5 = ? 30 + 5 = ? 35!!!!

90!!!! You Try!!!! Evaluate 6(g + h) for g=8 and h=7. 6(8 + 7) = ? 6(15) = ? 90!!!! Substitute for the variables! Do order of operations!

You Try!!!! 23!!!! Substitute for the variables! Do order of operations! Evaluate 2xy – z for x=4, y=3, and z=1. 2(4)(3) - 1= ? 8(3) - 1= ? 24 – 1 = ? 23!!!!

Homework!!!! Page 15: 1-7, 11-14, 17-26 1.1 Worksheet