Problem 48 Subtract. $$ 20-27 $$... [FREE SOLUTION]

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Chapter 1: Problem 48

Subtract. $$ 20-27 $$

Short Answer

Expert verified

-7

Step by step solution

Understand the Problem

The task is to subtract a larger number (27) from a smaller number (20). This will result in a negative number.

Subtraction Method

We perform the subtraction by following simple arithmetic rules: 20 - 27.

Calculate the Subtraction

To subtract 27 from 20, we find the difference: 20 - 27 = (20 - 20) - 7 which equals -7.

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Key Concepts

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

Negative Numbers

Negative numbers are simply numbers that are less than zero. They are usually written with a minus sign (-) in front of them. For instance, -7 is seven units below zero on the number line.
Negative numbers are useful for representing values that are less than nothing, such as temperatures below freezing or financial debts. When subtracting larger numbers from smaller ones, the result will often be a negative number.

Arithmetic Operations

Arithmetic operations are the basic operations we use in mathematics to perform calculations. These operations include addition, subtraction, multiplication, and division.
Each operation follows specific rules. For subtraction, which is an arithmetic operation, we take away one quantity from another. This helps us determine the difference between the two numbers.
For example, in the exercise, the operation is performed to find out what remains when 27 is subtracted from 20.

Integer Subtraction

Integer subtraction is the process of finding the difference between two whole numbers, which can be positive or negative. When subtracting integers, it is essential to understand the number line.
To subtract 27 from 20, you essentially move 27 units to the left from 20 on the number line.
This is because subtraction indicates moving leftwards, and when the starting point is smaller (20 in this case), you end up with a negative value, which is -7 here.

Basic Math Skills

Basic math skills are foundational for understanding and performing arithmetic operations, such as subtraction.
These skills include knowing how to work with whole numbers, understanding place value, and being able to perform operations like addition and subtraction with confidence.
For the given problem, the critical basic math skill is being able to subtract correctly, even when the result may be a negative number. Ensuring you practice these skills will help you solve similar problems efficiently.

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91影视

Subtract. $$ 20-27 $$

Short Answer

Step by step solution

Understand the Problem

Subtraction Method

Calculate the Subtraction

Key Concepts

Negative Numbers

Arithmetic Operations

Integer Subtraction

Basic Math Skills

One App. One Place for Learning.

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