Chapter 2 Operation Sense Lesson 2.1 Algebra Expressions

Vocabulary Variable A letter or symbol that can stand for one or more numbers. Numerical Expression A mathematical phrase that includes Only numbers and operation symbols. Algebraic Expression An expression that includes a variable. It contains a number, letter and a sign. Evaluate To find the value. 5 + nK x 34

Translating expressions Write a numerical or algebraic expression for the word expression. 7 more than t 7 + t 2 times a distance d 2 d 3 dollars less than times 245 x 24

You Try Thirteen $5 bills Twenty five less than seventy Seven more than t Y divided by thirty - four 13 x t or t + 7 Y / 34

Evaluate the algebraic expression To evaluate an algebraic expression, replace the variable ( letter) with the value given. Then solve the expression. T + 17, for t = = 38 36, for y = 9 y 36 = 4 9 P – 5, for p = – 5 = 15 7b, for b = 4 7 x 4 = 28

Your Turn 63b for b = x 15 = w, for w = = 404 A B, for a = 253 and b = = 23 K – 65, for k = – 65 = 30

Good luck on your assignment!!!!!!! Good luck on your assignment!!!!!!!