How can 3 68 1 97 0 84 be calculated?

Solution analysis: rounding, according to the four rules of operation for the operation, the same level of operation is calculated in order, and the different levels of operation are calculated first, so the result can be obtained quickly.

Regarding the calculation using an easy method, the method is as follows:

121 (211 (12 12 12 12 12 (11 2 12 (12 4 12 2 2 12.

Think of it as 2, subtract and then add, and then add it can also be seen as 1 plus up to subtract, of course, it is faster with a calculator.

According to the problem, the simple calculation methods used in this math problem are the additive distributive law, the additive associative law, and the additive commutative law, with the original formula =(.

Analysis: First of all, the brackets are bracketed, and the root trace slide hole is changed to "a-(b-c)" according to the "a-b c" law, which is 89-(; Then a simple calculation will be performed according to the multiplicative distributive property, i.e., 89-[,89-[,89-[; Finally, according to the law of "a b-c", the formula in the brackets is changed to "a-(b-c)", and the posture is 89-[,89-[,. Here's the answer:

89-[Jean.]

Simply pretend to be a forest and calculate the god file. Hall blind acres.

Hello, the short calculation is as follows:

Hope it helps.

The simple solution to the equation is as follows:

The simple solution method for this calculation is as follows:

Use the carry method, addition and subtraction knot and law.

You can do it first.

Reuse so it is easy to calculate the result.

The idea of the commutative law of addition is used.

One by one.

One-to-one 2+one-to-one.

This normal order can be calculated

How do you calculate it with a simple calculation?

It's not good to delay time and think. It's better to calculate according to the four rules of the algorithm. - That's the simple calculation.

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.

The most common method used in simple calculations is the multiplicative distributive property. The multiplicative distributive property refers to ax(b+c) = axb+axc, where a, b, c are arbitrary real numbers. Conversely, AXB+AXC=AX(B+C) is called the inverse of the multiplicative distributive law (also known as extracting the common divisor), especially when a and b complement each other, this method is more useful.

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 additive commutative law.

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）

This one should be put in the back.

It becomes -2+ and so it becomes.

Hello, glad to be able to your question. A simple calculation is as follows.

It can be seen that it is the same and can be extracted, then so =

This question can be written as, calculated first.

Original = .

Simple Macro empty poop calculation?

There is no too easy way to hide the blind in this problem, and the direct calculation is also very simple:

Mu stupid hope to help you stir up! Ming Naiji.