Algebraic Terms Verbal Expressions to Algebraic Expressions Miss

Algebraic Terms Verbal Expressions to Algebraic Expressions Miss La. Due’s Grade 6 Math

Variable n A variable is a letter representing an unknown number. The letters can be anything from a-z. The most commonly used are x and n.

Constant A constant is a known number value. n The number in the expression or equation. n Examples: 5, 27, 298 n

Expression An expression includes a variable, a constant, and an operation. n Examples: ü 5+n ü x – 27 ü 12 x a ü b/9 n

Equations n n ü ü ü An equation is a mathematical sentence that uses an equal sign, =, to show that two expressions are equal. Equations include a variable, constant, operation, equal sign, and answer. Examples: 23 + x = 78 n – 6 = 31 9 a = 54

Expression vs. Equation Is it an expression or equation? 25 – x n + 12 = 93 7 b = 21 x– 8 90 + a 12/ c = 36 n

An equation can either be true or false… Sometimes we are given values for the variable and have to determine whether that value would make the equation true or false. n Example: n 8 + r = 17 r = 9 n 8 + 9 = 17 ? n This is true! n

Let’s try some more 5 h = 25, h=5 5 x 5 = 25? Yes, this is true. n 16 – x = 7, x = 12 16 – 12 = 7? No, this is false. n

Now try some more…. w – 23 = 2. w = 19 n 10 y = 30, y = 3 n s + 45 = 52, s = 7 n 15 = 5, q = 5 q Answers: No, Yes, No n