Myron got his paycheck of $40 this week. He had $11 left after he spent m dollars on a new video game. How much did the video game cost? Cedric's correct equation: 40 – m = 11 (A) How did Cedric know that this was an equation and not an expression? (B) Why subtract m from 40 rather than add m to 40?
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
1. Cedric read the following story problem and wrote a correct equation to represent the situation.
Myron got his paycheck of $40 this week. He had $11 left after he spent m dollars on a new video game. How much did the video game cost?
Cedric's correct equation: 40 – m = 11
(A) How did Cedric know that this was an equation and not an expression?
(B) Why subtract m from 40 rather than add m to 40?
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