The distributive law, also known as the distributive property, is a mathematical rule that relates the operations of multiplication and addition. It states that multiplying a number by a group of numbers added together is the same as multiplying each number in the group by the first number and then adding the results. This can be expressed symbolically as a(b + c) = ab + ac. The distributive law is also applicable to subtraction and can be expressed as a(b − c) = ab − ac. The law can be used to simplify complex expressions and is one of the most frequently used properties in mathematics.
Characteristics | Values |
---|---|
Name | Distributive Law, Distributive Property |
Application | Applicable to addition, subtraction, and division |
Formula | a × (b + c) = ab + ac |
Description | Multiplying a number by a group of numbers added together is the same as multiplying each number separately |
What You'll Learn
Distributive law of multiplication over addition
The distributive law of multiplication over addition, also known as the distributive property, is a fundamental property in mathematics. It states that multiplying a number by a group of numbers added together is the same as multiplying each number in the group by that number separately. In other words, the multiplication is "distributed" across the addition.
This law can be expressed symbolically as:
- A(b + c) = ab + ac
- (a + b)c = ac + bc
Here, a, b, and c are any real numbers.
For example, let's consider the expression 3 x (2 + 4). Using the distributive law, we can rewrite this as 3 x 2 + 3 x 4. This gives us 3 x 2 = 6 and 3 x 4 = 12, so the overall result is 6 + 12 = 18.
The distributive law is a very useful tool in simplifying and solving mathematical expressions, especially those with multiple factors. It can be applied to both addition and subtraction, and it also works with variables and fractions.
The distributive law is one of the most frequently used properties in mathematics, along with the commutative and associative properties. It is a basic property of numbers and is part of the definition of many algebraic structures, such as complex numbers, polynomials, and matrices.
Civil Law and Private Colleges: Who Rules the Roost?
You may want to see also
Distributive law of multiplication over subtraction
The distributive law of multiplication over subtraction is a property that allows us to simplify expressions when multiplying a number by the difference of two other numbers.
The distributive law of multiplication over subtraction is a specific case of the more general distributive law, which relates the operations of multiplication and addition. The general distributive law states that for any three numbers, a, b, and c:
A x (b + c) = a x b + a x c
In words, this means that multiplying a number (a) by a group of numbers added together (b + c) is the same as multiplying that number by each of the numbers in the group separately and then adding the results.
The distributive law of multiplication over subtraction is a special case of this law, where we are multiplying a number by the difference of two other numbers. Mathematically, this can be written as:
A x (b - c) = a x b - a x c
This formula states that the product of a number (a) and the difference of two other numbers (b - c) is equal to the difference of the products of that number with each of the two other numbers.
For example, let's consider the expression 5 x (7 - 3). Using the distributive law of multiplication over subtraction, we can rewrite this expression as 5 x 7 - 5 x 3, which equals 35 - 15 = 20.
The distributive law of multiplication over subtraction is a useful tool for simplifying expressions and solving equations. It is also used in various areas of mathematics, including algebra, arithmetic, and logic.
Ohm's Law: Understanding DC Circuit Basics
You may want to see also
Distributive law of division
The distributive law of division is a method used to simplify division problems by breaking down or distributing the numerator into smaller amounts, making the division easier to solve.
For example, instead of solving 12/5 directly, you can use the distributive law of division to simplify the numerator and turn this one problem into three smaller, easier division problems. So, 12 can be written as 10 + 10 + 2, and the division problem can be rewritten as:
10 + 10 + 2) / 5 = (10/5) + (10/5) + (2/5) = 2 + 2 + 0.5 = 4.5
The distributive law of division is the same as the distributive law of multiplication, with only the operation changing from multiplication to division. The larger term is divided into smaller factors (addends), and the divisor acts as the operand.
The distributive property does not apply to division in the same way it does to multiplication. However, the concept of "breaking apart" or "distributing" can be applied to division by dividing the numerator into smaller amounts that are exactly divisible by the divisor.
Labor Laws: Universal or Unique to Each Country?
You may want to see also
Distributive property of integers
The distributive property of integers is a fundamental concept in mathematics that simplifies calculations involving arithmetic operations on integers. This property is closely related to the distributive law, which states that multiplying a number by a group of numbers added together is equivalent to performing each multiplication separately. In other words, it allows us to "distribute" the multiplication across the addition.
The distributive property of integers specifically deals with the operations of multiplication, addition, and subtraction. It can be expressed as:
Distributive property of multiplication over addition: For integers a, b, and c, we have:
> a × (b + c) = (a × b) + (a × c)
Distributive property of multiplication over subtraction: For integers a, b, and c, we have:
> a × (b − c) = (a × b) − (a × c)
This property is useful when we need to multiply a number by the sum or difference of two other numbers. For example, let's consider the expression 5 × (10 + 3). Using the distributive property, we can either first add 10 and 3, then multiply by 5:
> 5(10 + 3) = 5(13) = 65
Or we can distribute the 5 and multiply it by each number inside the parentheses, then add the results:
> 5(10) + 5(3) = 50 + 15 = 65
Both methods yield the same result, demonstrating the applicability of the distributive property.
The distributive property is not limited to integers alone. It is a fundamental property in algebra and is applicable to various algebraic structures, such as complex numbers, polynomials, matrices, rings, and fields. It also extends beyond multiplication and addition, playing a role in logical disjunction and conjunction, as well as maximum and minimum operations.
Police and HIPAA: What's the Deal?
You may want to see also
Distributive property with variables
The distributive property, also known as the distributive law, is a fundamental concept in mathematics that relates multiplication and addition. This property allows us to distribute a number or variable across multiple terms within parentheses. The distributive law can be stated symbolically as:
A(b + c) = ab + ac
In this expression, the monomial factor 'a' is distributed, or separately applied, to each term of the binomial factor 'b + c'. This results in the product 'ab + ac'.
For example, let's consider the expression 2 + 4x. We can apply the distributive property and factor out the greatest common factor, which is 2, like this:
2 + 4x = 2(1 + 2x)
Here, we've distributed the 2 across both terms within the parentheses.
The distributive property is not limited to simple numbers; it can also be applied to variables and algebraic expressions. For instance, we can use the distributive property to factor out a variable like 'A' from an expression such as 'AX + AY'. By applying the distributive property, we can rewrite this expression as 'A(X + Y)'.
The distributive property is a powerful tool in algebra, allowing us to simplify and manipulate expressions by distributing factors across multiple terms. It is one of the building blocks of algebra and plays a crucial role in various mathematical structures, including complex numbers, polynomials, matrices, rings, and fields.
US Laws: Global Reach and International Boundaries
You may want to see also
Frequently asked questions
The distributive law, also known as the distributive property, relates the operations of multiplication and addition. It states that multiplying a number by a group of numbers added together is the same as multiplying each number in the group by that number separately.
The formula for the distributive law is given by:
x(y + z) = xy + xz
The distributive law applies to logical disjunction ("or") and conjunction ("and").