9 8 25 Simple arithmetic, urgent and urgent

Here's how to do it:

1.It can be calculated like this:

2.Simple calculation is a special kind of calculation, which uses the laws of operation and the basic properties of numbers, so as to make the calculation simple, so that a very complex formula becomes easy to calculate the number, so that the result can be quickly obtained, saving time.

3.Methods that can be used: multiplicative associative law, multiplicative commutative law, additive associative law, additive associative ratio, etc.

Clever calculation process.

Solution: Four rules of operation (calculated in order, multiplication and division first, then addition and subtraction, parentheses are counted first, and power is calculated first), that is, the off-form operation (recursive equality calculation) needs to be carried out under the premise of this principle. Problem solving process:

Extended information: first align the last digit of the two multipliers, then use the second multiplier respectively, multiply a multiplier by each digit from the last digit, and finally add up the calculated result to be the product, if the multiplier is a decimal place, it can be expanded by the corresponding multiplier first, and finally the product is reduced by the corresponding multiple;

Problem solving: Step 1: 5 98=490

Step 2: 2 98 = 1960

According to the above calculation steps, the combined result is 245

If you have any doubts, please ask and be satisfied.

Nine point 6 1 point 25, implicit imitation is equal to 8 1 point 2 1 point 25, equal to multiply by 1 point 25 1.2, equal to Daheng 10 1 point two, equal to 12, because one point 25 8, you can get a stove front integer, so it is written as 8 1.2.

Decompose it into 8 times the chain Lu Huiyi, and the early style shed answer becomes multiplied by 8 times by, 8 times equals 10, and then multiplied by 10 equals 12

Easy to calculate. The process is as follows:

So the end result of the simple calculation is:

Jian Chong teased and calculated the finger disturbance process such as scattered pure:

Simple calculation is a special kind of calculation, which uses the laws of operation and the basic properties of numbers, so as to make the calculation easy, so that a very complex formula becomes easy to calculate the number.

Multiplicative distributive property.

The most common method of simple calculations is the multiplicative distributive law. The multiplicative distributive property refers to ax(b+c) = axb+axc, where a, b, c are arbitrary real numbers. On the contrary, axb+axc=ax(b+c) is called the inverse application of the multiplicative distributive law (also called extracting the common divisor), especially when a and b are complements each other, this method is more useful Lu Yu.

There are also times when the associative property of addition is used, such as a+b+c, where b and c are complements to each other, so you can combine b and c and multiply it with a. If the + in the above equation is changed to x, it can also be easily calculated by using the associative property of multiplication.

The associative law of multiplication.

The associative law of multiplication is also a method of doing simple operations, which is expressed by letters as (a b) c = a (b c), and its definition (method) is: multiply three numbers, first multiply the first two numbers, and then multiply the third number; Or multiply the last two numbers first, and then multiply them with the first number, and the product remains the same. It can change the order of operations in multiplication operations, and the multiplication law is not used very much in daily life, mainly in some more complex operations to play a simple role.

The commutative law of multiplication.

The multiplicative commutative law is used to swap the positions of individual numbers: a b = b a addition commutative law is dry.

The additive commutative property is used to swap the positions of individual numbers: a+b=b+a, the additive associative law.

a+b）+c=a+（b+c）

Summary. Dear, hello,,And, so you can calculate first, and then use multiply by 4, and the answer is a simple operation.

Dear,Hello,,The hall disturbs the clan and Li suspects,So you can calculate first,Then use multiplication by 4,The answer to calculate the cheat is to hope that you have the help of the clan Minwu or help,If you have any questions, please bring it up Take this

It can be used to make a simple calculation of the invariant macro frontier quality of the early use of the bridge

Because, so the original formula is equal to 99 using the inverse operation of the multiplicative distributive law is there.

To do the math simply, convert it to, that is.

The operation method of this problem is very simple, that is, will.

99x2546+

Two (99+1).

So how does the simple method of this problem work?

Solution: There are two ways:

Method 1: 99*

Method 2: Original =