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Chapter 1: Problem 86

Translate the English phrase to a mathematical statement and simplify. Subtract 42 from 89

Short Answer

Expert verified
89 - 42 = 47

Step by step solution

01

Identify Numbers

Identify the numbers given in the phrase. The numbers are 42 and 89.
02

Translate to Mathematical Statement

Translate the phrase 'Subtract 42 from 89' into a mathematical expression. This becomes: 89 - 42
03

Perform the Subtraction

Perform the subtraction operation to simplify the expression. 89 - 42 = 47

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

subtraction
Subtraction is one of the four basic arithmetic operations and it is fundamental in mathematics.
It is the process of taking one number away from another.
When you perform subtraction, you are finding the difference between two numbers.
In our exercise, we need to subtract 42 from 89.
This simply means we start with 89 and take away 42.
The final result or difference in this case is 47.
This can be visualized using a number line where you start at 89 and move 42 steps back to land on 47.
Understanding how to properly perform subtraction is crucial because it is used in many different areas of math and everyday life.
  • Subtracting smaller numbers from larger ones.
  • Borrowing in subtraction when the top digit is smaller.
  • Checking your work by adding the difference back to the subtracted number to get the original number.
mathematical expressions
A mathematical expression is a combination of numbers, operations, and sometimes variables that represents a value.
In our problem, the phrase 'Subtract 42 from 89' needs to be translated into a mathematical expression.
To do this, we put the larger number first, followed by the subtraction sign, and then the smaller number.
Therefore, 'Subtract 42 from 89' becomes 89 - 42.
Mathematical expressions can include different operations like addition, subtraction, multiplication, and division.
  • It's important to understand how to translate word problems into accurate mathematical expressions.
  • Recognizing keywords like 'subtract,' 'from,' and 'left' can guide you in forming the correct expression.
  • Simplifying expressions accurately ensures correct results and deeper understanding of mathematical relationships.
simplification
Simplification in mathematics means making an expression easier to understand and work with by performing the operations within it.
For the expression 89 - 42, simplification involves performing the subtraction to find the result or the simplest form of the expression.
In this case, 89 - 42 simplifies to 47.
Simplifying expressions not only helps in solving math problems more easily but also makes it easier to communicate and understand mathematical ideas.
  • Always perform the operations in the correct order to simplify accurately.
  • Simplification can also involve combining like terms when dealing with algebraic expressions.
  • Clear and concise simplification can help identify patterns and solutions more readily.
It's a key step in math problem-solving that demonstrates the application of basic math operations to reach a final, understandable answer.

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