Download presentation

Presentation is loading. Please wait.

Published byVictoria Taylor Modified over 8 years ago

1
5.1 Algebraic Expressions

2
CAN YOU FOLLOW ORDER OF OPERATIONS?

3
PEMDAS Please Excuse My Dear Aunt Sally

4
Can You... Evaluate an algebraic expression? Let’s try it...

5
To evaluate an algebraic expression: FIRST, substitute a given number(s) for the variable(s) FINALLY, find the value of the resulting numerical expression (Use Order of Operations!!)

6
Evaluate each expression for the given value of the variable. You will have to use Order of Operations! Substitute 15 for x. Subtract. 1. x – 9 for x = 15 15 – 9 6 Substitute 3 for y. Multiply. 2. 5y + 7 for y = 3 5(3) + 7 15 + 7 Add. 22

7
Evaluate each expression for the given value of the variable. Show one step at a time! Substitute 2 for e. Multiply. 3. 9e for e = 2 9(2) 18 Substitute 5 for t Multiply. 4. 6t - 24 for t = 5 6(5) - 24 30 - 24 Subtract. 6

8
Evaluate the expression for the given values of the variable. 6(x + 6) + 4 for x = 5, 6, 7 567567 x Substitute Parentheses Multiply Add 6(5 + 6) + 46(11) + 4 66 + 4 70 6(6 + 6) + 46(12) + 4 72 + 4 76 6(7 + 6) + 46(13) + 4 78 + 4 82

9
Evaluate the expression for the given values of the variable. 5(n - 8) – 2 for n = 10, 15, 20 10 15 20 n Substitute Parentheses Multiply Subtract 5(10 - 8) - 25(2) – 2 10 – 2 8 5(15 - 8) - 25(7) – 2 35 – 2 33 5(20 - 8) - 25(12) – 2 60 – 2 58

10
Evaluate each expression for the given value of the variables. Substitute 2 for x and 1 for y. Multiply. 11. 4x + 3y for x = 2 and y = 1 4(2) + 3(1) 8 + 3 Substitute 12 for m and 8 for n. Multiply. 12. 3m – 4.1n for m = 12 and n = 8 3(12) – 4.1(8) 36 – 32.8 Add. 11 Subtract. 3.2

11
Evaluate each expression for the given value of the variables. Substitute 3 for x and 4 for y. Multiply. 13. xy – 4 2 for x = 3 and y = 4 3(4) – 4 2 12 - 8 Substitute 5 for x and 12 for y. Divide. 14. 60 – y for x = 5 and y = 12 x 60 – 12 5 12 – 12 Subtract. 4 0

12
Can You... Evaluate an algebraic expression?

13
Warm Up Show your work One Step at a Time! Write an algebraic expression for the following phrases. 4. 47 more than the product of 81 and a number n 5. Divide the difference of 31 and a number c by 54 6. The product of x and 5 decreased by 23 1. (1 + 2 3) 2 ÷ 7 2. 2(3 +1) - 7 3. (16 – 5 3) 2 + 9

Similar presentations

© 2024 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google