How do you calculate 10620 15 14x15?

Original = 708-15*2*7

498 answers the question hard.

Simple operation of addition. There are two main laws of operation used in the simple operation of addition: the commutative law of addition and the associative law of addition, and of course there are other flexible methods, the basic principle of which is to make up.

10. Make up 100 and so on. In short, after the simple calculation and processing, it should be conducive to our oral calculation and obtain the result. 2. Simple operation of subtraction.

The simple operation of subtraction mainly uses the arithmetic property of subtraction, that is, subtracting two numbers in a row is equal to subtracting the sum of these two numbers. 3. One of the simple operations of multiplication: skillfully use the commutative law of multiplication and the associative law of multiplication to perform simple operations.

The basic method is also to make it together through exchange and combination.

Ten, the whole hundred, the whole thousand, so that we can calculate the result. 4. The second simple operation of multiplication: skillfully use the multiplication distributive law.

There are two forms of multiplicative distributive distributive law: positive multiplicative distributive and reverse multiplicative distributive law. 5. Simple operation of multiplication II: complex usage of multiplicative distributive law.

Some simple problems that seem to be unable to directly apply the multiplicative distributive law need to be deformed to solve the problem by using the multiplicative distributive law. 6. Simple operation of division. The simple operation of division mainly uses the arithmetic nature of division, that is, a number is divided by two numbers consecutively, which is equal to the product of the division of these two numbers.

This formula is not to add parentheses, this is itself a simple calculation method, first get 500 in parentheses, and the result of the quotient is 2

Answer: 20Parse: 1300 (13x5).

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.

There are also additional associative properties, such as a+b+c, where b and c are complements, so you can combine b and c and multiply them 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.

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 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.

3. Multiplication commutative law.

The multiplicative commutative property is used to invert the positions of individual numbers: a b = b a4, and the commutative property of addition.

The additive commutative property is used to swap the positions of individual numbers: a+b=b+a5, and the additive associative law.

a+b)+c=a+(b+c)

Summary. Hello! 14+86x32=14+86x（30+2）=14+2580+172=2594+172=2766

14+86 32 How to shorten.

Hello! 14+86x32=14+86x（30+2）=14+2580+172=2594+172=2766

Can you add, I don't quite understand it.

With the splitting method, 86 can be divided into 80+6 or 32 into 30+2 in the calculation, and then the off-form calculation can be performed.

This problem is easy to calculate from scratch.

There are no parentheses to calculate multiplication and division at the same time.

The original formula directly uses the four operations is very simple: 3600 60-15*4 is equal to 60-60 is equal to 0

Let's just do the multiplication and division first.

This oral calculation is fine, and there is no need to calculate it simply.

Summary. 3600÷60-15x4

3600 60-15x4 easy to calculate?

3600÷60-15x4=60-60=0

Why. Which place and why.

Why direct results.

Ok thank you.

You're welcome<>

Summary. 15x(104÷4)=15*26=15*20+15*6=600+90=690

15x (104 4) simplified.

15x(104÷4)=15*26=15*20+15*6=600+90=690

15x(104÷4)=15*26=15*20+15*6=300+90=390

The second one is the first one!