91影视

When translating a phrase into a mathematical expression, the goal is to convert words into symbols that represent a specific operation or value. This process involves understanding the core meaning conveyed by the words. For instance, if we look at the phrase 鈥渢he speed \( u \) decreased by 10,鈥� we need to determine how each part of the sentence contributes to the mathematical operation.
- The word "decreased" implies a reduction, which corresponds to subtraction in mathematics.- "by 10" specifies the exact amount to decrease, which is our subtraction quantity.
By translating this phrase correctly, you establish a clear mathematical expression, which facilitates solving problems that involve the described scenario. For this reason, translating phrases is a critical skill for interpreting and solving mathematical problems effectively.

Variables are symbols used to represent unknown or changeable values within mathematical equations or expressions. In our exercise, the phrase contains the variable \( u \). A variable can be any letter, and it essentially serves as a placeholder.
- In this case, \( u \) stands for 'speed'. - It's important because it allows you to represent any number mathematically and lets you formulate a broader range of expressions.
Identifying the variable is the first essential step when approaching math problems that include expressions or equations. By clearly recognizing what the variable represents, you can accurately proceed to develop a solution that reflects the problem's requirements.

Subtraction expressions are straightforward, depicting the process of taking one quantity away from another. The original phrase "the speed \( u \) decreased by 10" directly translates to this kind of expression.
- In our context, subtracting means that you take 10 away from whatever value \( u \) represents.- The subtraction operation is symbolized by the minus sign \(-\) followed by the number being subtracted.
The outcome is expressed simply as \( u - 10 \), where \( u \) is our variable and 10 is the amount we subtract. Understanding basic subtraction is foundational before moving onto more complex arithmetic concepts, as it forms part of many critical problem-solving steps.