How can 125x7x8 be easily calculated?

Simple calculation is to transform what is difficult to see directly into an answer that can be calculated by calculation.

Simple algorithms are divided into several categories.

1.Addition and subtraction rounding:

1) Split a certain number so that it can be combined with other numbers to form a whole ten, a whole hundred, for example: 999 + 9 + 2 = 1000-1 + 1 1 + 2 = 1010

2. Group rounding.

Additive associative property: a+b+c=a+(b+c)=(a+b)+c;

Property of subtraction: a-b-c=a-(b+c).

3. The extraction of common factors mainly uses the multiplicative distributive law to extract the common factor, a x (b c)=a x b a x c

In this problem, we will first calculate the product of 125 and 8.

125×7×8 =125×8×7 =1000×7 =7000。Simple operations can be obtained by using the commutative property of multiplication.

Apply the commutative and associative laws of multiplication.

But Zheng Ran used multiplication, commutative law and associative law to shout and make a virtual use. Hu Xing.

Using the associative law of multiplication, changing the order of operations remains the same, so the original equation is equal to 87 (125 8) = 87000

You can open the calculator to calculate.

Equations containing unknown quantities are equations, mathematics was first developed in counting, and about numbers and unknowns are combined by addition, subtraction, multiplication, division, and idempotency to form algebraic equations: unary equations.

Unary quadratic equations, binary quadratic equations.

Wait a minute. However, with the emergence of the concept of functions and the introduction of function-based differentiation and integration operations, the scope of equations has become more extensive, and unknown quantities can be mathematical objects such as functions and vectors, and operations are no longer limited to addition, subtraction, multiplication and division.

Equations occupy an important place in mathematics and seem to be the eternal problems of mathematics. The emergence of equations not only greatly expanded the scope of mathematical applications, so that many problems that could not be solved by arithmetic solutions could be solved, but also had a great impact on the progress of mathematics in the future. In particular, many major discoveries in mathematics are closely related to it.

For example, the solution of a quadratic equation results in an imaginary number.

the discovery; The solution of equations of the fifth degree or more led to the birth of group theory;

The study of a system of equations that leads to linear algebra.

the establishment of polynomials, which led to the emergence of polynomial algebra;

The application of equations to solve geometric problems, leading to the formation of analytic geometry, etc.

Since mathematics from constants.

Mathematics is transformed into variable mathematics, and the content of equations is also enriched, because mathematics introduces more concepts, more operations, and thus more equations. The development of other natural sciences, especially physics, has also directly put forward the need for equation solving, providing a large number of research topics.

125x (72x8) with a simple calculation as Zheng answered:

125x(72x8)

125x8x72

1000x72

I hope it can help you, what's the trouble, I don't know how to keep asking, hope! Thank you.

One hundred and twenty-five times eight equals one thousand. One thousand times seventy-two equals seventy-two thousand, and this is the simplest way to calculate it.

With the multiplication commutative law, first 125x8x72, 125x8 1000, then 72, the answer is 72000

The simple calculation process is as follows.

Solution: 125 (27 8).

Solution: 125x37x8 is equal to (37000) It is known how much 125x37x8 is equal to.

x × y × z = x × z × y∴125 x 37 x 8

A: 125x37x8 equals 37000