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Easy calculation,.
Solution: Four rules of operation (calculated in order, multiplication and division first, then addition and subtraction, parentheses are counted first, and power is calculated first), that is, the off-form operation (recursive equality calculation) needs to be carried out under the premise of this principle. Problem solving process:
Extended data [vertical calculation - calculation result]: first align the last digit of the two multipliers, then use the second multiplier respectively, multiply a multiplier for each digit from the last digit in turn, and finally add up the calculated result to be the product, if the multiplier is a decimal place, you can first expand it by the corresponding multiple, and finally the product is reduced by the corresponding multiple;
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Analysis of the clever calculation process.
Solution: Four operations.
Rules (calculated in order, multiplication and division first and then addition and subtraction, with parentheses first with parentheses, with multiplication.
Calculate the power first) i.e. an off-form operation (recursive equation.
calculations) need to be carried out under the premise of this principle. Problem solving process:
Extended material "Vertical Computing.
First align the last digit of the two multipliers, and then use the second multiplier respectively, multiply a multiplier for each number from the last digit in turn, and finally add up the calculated result to be the product, if the multiplier is a decimal place, it can be expanded by the corresponding multiplier first, and finally the product is reduced by the corresponding multiple;
Problem solving: Step 1: 1 9=9
Step 4: 1 9 = 9000
According to the above calculation steps, the combined result is:
If you have any doubts, please ask and be satisfied.
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mathematics [English: mathematics, from the ancient Greek máthēma); Often abbreviated as math or maths], it is a discipline that studies concepts such as quantity, structure, change, space, and information.
Mathematics is a general means for humans to strictly describe the abstract structure and pattern of things, and can be applied to any problem in the real world, and all mathematical objects are inherently artificially defined. In this sense, mathematics belongs to the formal sciences, not the natural sciences. Different mathematicians and philosophers have a range of opinions on the exact scope and definition of mathematics.
In the historical development and social life of mankind, mathematics plays an irreplaceable role, and it is also an indispensable basic tool for learning and researching modern science and technology.
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Solution: Equal to ( ).
It is known that simple calculations are required.
A: Yes.
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This is the multiplicative distributive property of the rationale synthesis.
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The simple calculation process is as follows:==
So the end result of the simple calculation is:
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This question mainly examines the application of the distributive property of multiplication.
The multiplicative distributive law refers to the multiplication of the sum of two numbers by a number, which can be multiplied by each number and then added. [(a+b) c=a c+b c] (letter representation) [a c+b c=(a+b) c] (letter representation) [graphic representation] [leather finger graphic representation variant).
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It can be split into 10+, with a round body orange with an age of age, so that the result can be calculated by taking apart the old belt.
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Summary. Do you calculate it with ease.
Easy way.
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Summary. 丨1Multiplicative associative = (10 丨2.Multiplication and division calculations = easy calculations.
丨1Multiplicative associative = (10 丨2.Multiplication and division calculation = analysis: use the multiplication associative law to calculate first, and the correct answer can be obtained in the calculation<>
Multiply the three numbers, you can first multiply the first two rolling numbers, and then multiply the third number; You can also multiply the last two numbers first, and then multiply them with the first number, and the result remains the same, which is the multiplication knot perturbation law. <>
<> Further reading: The multiplication law is a kind of multiplication and one of the many easy methods for spring rent. Multiply three numbers, first multiply the first two numbers, then multiply another number, or multiply the last two numbers first, and then multiply the other number with the bedrock, and the product remains the same.
It's called the multiplicative associativity law.
Easy to calculate.
The core of simple operation is to use the laws of addition and multiplication to calculate, and calculate the integer part to facilitate the subsequent calculation. Problem solving process: >>>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.
Chinese name]: Simple calculation.
The most commonly used method: multiplicative distributive property. >>>More
Simple calculations can be made in the following way:
1+2+3+4+5+6+…Easy calculation of +100.
Solution: 1 2 3 4 5 6 ......99 100=(1 100) (100 zhi2)=101 50=5050 Analysis: dao1+100=101,2+99=101,3+98=101,4+97=101....Back to.... 50+51=101 >>>More