63 45 63 52 37 97

The simple calculation is as follows:

This problem should be divided into two steps, first use the inverse operation of the multiplicative distributive property to calculate the first two groups, and then proceed to the second step after the result is obtained, which also uses the inverse operation of the multiplicative distributive property to achieve the purpose of simple operation.

Extended material: Multiplicative distributive properties.

Concept: When multiplying the sum of two numbers by a number, you can first multiply them separately by this number and then add them together. It is expressed by letters as: (a b) c=a c b c.

The calculation method of the multiplicative distributive property is actually a convenient operation by changing the order of its operation to make the process of operation easier. Often in the process of calculation, the distributive calculation of the multiplicative distributive property and the use of the multiplicative distributive law may make the calculation easier, so which method to use and the order of the operation need to be observed by the students to observe the formulas and numbers that need to be calculated.

There are many laws of operation for simple calculation, such as the distributive law of multiplication, the associative law of multiplication, the commutative law of multiplication, the commutative law of addition, the associative law of addition, etc. 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 application of the multiplicative distributive property.

Xie Li Bi: 125x8=1000, then you can change the division to multiply and add parentheses, and then pin the disturbing branch according to the four rules of operation to calculate the sensitivity. Calculation process.

750 120 Calculation of the early limbs of the Jane Bright Body.

Simple calculation of 157 98.

Hello dear! 157 98 The simple calculation of the source is such a hail cover 157 98 157 (100-2) Hengyuan 157 100-157 2 15700-314 15386

Summary. The result is equal to 5. Process: 475 95 = 475 (5 19) = 475 5 19 = 95 19 = 5

Simple calculation of 475 95.

The result is equal to 5. Process: 475 95 = 475 (5 19) = 475 5 19 = 95 19 = 5

The method used in this problem is the associative law of multiplication.

Equal to (16 8) 42 = 2 42 = 84

So the result is equal to 84

As follows: Lap Sun.

4000 120 Vertical form of the number of the survey questions.

The simple operation steps are as follows:

1) Approximately equal to ).