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Hello, see the following ** question process:
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You can use the rounding method to subtract two numbers at the same time, in fact, it is equivalent to subtracting the sum of these two numbers exactly 11:01-4:73-5:27, which is actually equal to subtracting the sum of the sum and the exact sum, which is an integer, exactly ten, so this problem becomes 11:01-10 and becomes, and the result is.
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This problem uses the standard form of the nature of subtraction, which is a-b-c=a-(b+c), which is the sum of the two numbers subtracted by the subtraction of two numbers.
Thank you!
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The easy way to do this is to:
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Add a parentheses, first add the two subtractions to sum them, and then subtract them, as follows. Original =
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After the last two items are added in parentheses, they happen to be integers, so the original formula =
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Simple calculations for this topic.
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Easy to calculate.
8 5 (Written as a decimal is.)
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According to the law of subtraction, subtracting two numbers in a row is equal to subtracting the sum of the two numbers, so the original formula is equal to.
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Use the base group to excite the whole method.
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First you have to go to the brackets, then you have to move the items, and finally you have to figure out the land mold. This is the easiest way to change the code, which is long gone. Hope it helps.
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Direct multiplication is the simplest calculation and can be done in one step.
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Direct multiplication is the simplest calculation, in one step.
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Count the brackets first, and the final result is equal to.
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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 and make a very complex formula easy to calculate.
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 dig each other into the ridge cavity as a complement, this method is more useful.
Sometimes the associative law of wild pure addition is used, such as a+b+c, where b and c are complements, 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)
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。Stool amuses: This problem mainly uses the addition exchange law to simplify the finger laughing operation.
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As follows: + Wandering math problems.
The simple calculation of the step slag rush is as follows:
1) Shen Liang = -
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A quiet delay (volt ride, a lack of luck to take (one one 12
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The simple and stuffy calculation steps of this equation are as follows:
Decimal division first: =
Then multiply decimals: 12 =
Final addition: -=
The canopy is enclosed with - 12 =.
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You have a good reputation for good luck:
Here's the answer:
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Solution analysis: make up ten, make up hundred, use the associative law, commutative law, according to the four rules of operation for 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.
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The commutative law of addition is used to perform the calculation. Point six and seven combined. Get and add together to get ten. Then use 17-10. Get seven.
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Regarding the simple calculation, the detailed operation process is as follows:
Math Easy Calculation Method:
1. Simple calculation using the multiplicative distributive law. >>>More
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.
1.Commutative law of addition: a+b=b+a
Two additions swap positions, and the sum is invariant, which is called the commutative law of addition. >>>More
This problem first find the law, 90 can be transformed into 45 2, and then use the extraction common divisor method, extract the common divisor 45, axb+axc=ax(b+c), the 102 and -2 of this problem are complements to each other, you can combine 102-2, and then multiply with 45, the steps are as follows: >>>More
Simple calculation, 44 + 68 + 36 32.
Simple calculation idea: If we do simple calculation, we can use the distributive property of multiplication operation or the properties and laws of associative law or division operation to calculate, and get the effect of our simple calculation. If you want to do a simple calculation here, you can try to convert 36 to 40-4, and then use the distributive property of multiplication to calculate. >>>More