How easy is 4 6X2 8 Ten 1 25?

Here through the simple calculation above, the answer is:

According to the inscription column, it is calculated as follows:

This simple calculation should be just a direct calculation, first calculate the multiplication and then the addition, and then calculate it directly, there is no special easy way.

Multiply two by one point and two five, and add it up like that.

The easy way to do this is to count the whole number first.

There is basically no easy way to do this math because the first one is penalized, and then the one is followed by a separate decimal.

It's a simple multiplication, it's not difficult, just do a little more.

This question is actually very simple. I can't tell you the answer, because that's what you need to do the math yourself. How do I tell you the answer to the exam? Do you want me to stay with you during the exam?

In fact, this topic can be calculated first by the vertical method.

You'll have to use his simple calculations to figure out what his answer is.

I think that if you want to split the budget calculation items, you can directly separate the two of them.

I really should be able to add this thing to this sister.

At that time it was those I had already passed, and I really wasn't very heavy.

==10x10×

20 with, last.

In short, the purpose is to find the number related to 4, find 8, and make up hundreds of integers.

Analysis: There is a fixed collocation in simple calculations, such as: 4 25=100;8 125 = 1000, after observation, in this problem, split it into, and then multiply 8 by it, you will get the effect of 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.

First, the precautions for simple calculations are sleepy:

1. In simple operations, attention should be paid to the relationship between the operation symbol Wang Zhidong (multiplication, division, addition and subtraction) and large, medium and small parentheses.

2. Do not skip the level of operation, so as to avoid calculation errors.

2. The relevant laws of simple operation.

1. Multiplicative distributive property.

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.

2. Multiplication associative law.

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 definite meaning (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.

3. Multiplication commutative law.

The commutative property of multiplication is used to invert the positions of individual numbers: a b = b a

4. The nature of subtraction: a number subtracted from several numbers in a row is equal to the sum of a number minus these numbers.

The letter indicates: a-b-b = a-(b+c).

5. The nature of division: a number divided by several numbers in a row (except 0) is equal to the product of a number divided by these numbers.

The letter indicates: a b c = a (b c).

Untie! Original.

Method: After construction, the multiplicative associativity law was used to realize the calculation of the simple and the sloppy body. Gear Wang.

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Vertical take Chang Yu Chop