How easy is the math solution? Easy to calculate the solution?

Analysis: This problem uses the commutative associative law of addition, and then calculates it after rounding. The steps are as follows:

Analysis: In this problem, we first use the addition distributive property, convert 27 into (26 1), and then use the multiplicative associative law to make the operation easy.

17 and 17 26

Analysis: Using the rounding method and subtraction associative law calculation, first use the rounding method to transform 99 into (100-1), and then use a-b-c=a-(b+c) to calculate simply, the steps are as follows:

Analysis: Using the method of extracting the common factor, the formula: ac+ab=a(b+c), extracting the common factor, and adding it to make up the whole number, making the operation simple.

Analysis: This problem first uses the multiplicative distributive law, converts it into, and then uses the multiplicative associative law to make it easy to calculate.

.36 x -

Analysis: This problem uses the multiplicative distributive law, which can be converted to x, and the common factor can be extracted, and then it can be easily calculated according to the multiplicative associative law.

x -x - x

Analysis: This problem first uses the additive distributive property to convert 46 into (45+1), and then uses the multiplicative associative property: (a b) c=a (b c) to make the operation easy.

44 and 44 45

Analysis: This problem uses the multiplicative distributive property to convert it into 2, and then uses the multiplicative associative property: (a b) c=a (b c) to round up for simple calculation.

Analysis: This problem first uses the additive distributive property to convert it to 10+, and then uses the multiplicative associative law to make the operation easy.

Analyze the regularity of numbers and transform them flexibly! For the specific problem-solving process, please refer to **.

The molecular formula is a series of equal differences with a difference of 6, and there are 9 products added together, and the middle multiplication is 5x6, so the molecule 5 is 6x9

Denominator 3x4 3

So the result is (5, 6, 9), (3, 4, 3), 15, 2

Simple arithmetic is an indispensable part of mathematics teaching, which is regarded as an important means of thinking training and one of the main ways to cultivate number sense.

Example: Mathematical simple calculation skills.

1. The exchange law and the associative law of the impulse addition method are used to calculate the nuclear ante.

Such as: , etc. >2. Use the commutative and associative properties of multiplication to make simple calculations.

For example, if you encounter division, the same applies, or change division to multiplication. Such as: , etc.

3. Use the multiplicative distribution law to perform simple calculations, and when you encounter a number divided by a number, it is first turned into the reciprocal of multiplying a number, and then distributed.

For example, it should also be noted that some of the problems are simplified by using the inverse operation of the distributive law: that is, the common factor is extracted. As:.

4. Use the nature of subtraction to make a simple calculation. The nature of subtraction is expressed by a letter formula: abc = a (b + c) while paying attention to the reverse progression. For example: 7691 (691+250).

5. Use the nature of division to make simple calculations. The properties of division are expressed by a letter formula as follows: a+b=c=a+(bxc), while noting the reverse progression, e.g., 736:25 4.

6. The operation of numbers close to the whole hundred. This type of question requires the cooperation of skills such as splitting and conversion.

As:. 302 + 76 = 300 + 76 + 2, 298188 = 3001882, changed sentence and buried, etc.

7. Carefully observe an operation where a certain term is 0 or 1.

Such as: , etc. Mathematically simple methods.

Extract the common factor.

This method actually uses the multiplicative distributive law to extract the same factors, and often the remaining terms in the exam are added and subtracted, and an integer will appear.

The mathematical simple calculation method is explained as follows:

1.Signed Moving: When a calculation problem has only the same level of operations (only multiplication and division or only addition and subtraction) and no parentheses, we can "move with signs". For example: 23-11+7=23+7-11.

2.Combined Law: Bracketed Law:

1) When adding parentheses in addition and subtraction operations, the parentheses are preceded by the plus sign, the parentheses are unchanged, the parentheses are preceded by the minus sign, and the parentheses are to be changed. For example: 23+19-9=23+(19-9).

2) When adding parentheses in the multiplication and division operation, the parentheses are preceded by the multiplication sign, the parentheses are unchanged, the parentheses are preceded by the division sign, and the parentheses should be changed. For example: 2 6 3 = 2 (6 3).

3.Combined Law: De-bracket Law:

1) When removing the brackets in the addition and subtraction operation, the parentheses are preceded by the plus sign, the brackets are removed and the brackets are unchanged, the brackets are preceded by the minus sign, and the brackets are removed to change the sign (the original addition in the brackets is now to be subtracted; It used to be minus, but now it is going to be added). For example: 17+(13-7)=17+13-7.

2) When removing parentheses in the multiplication and division operation, the parentheses are preceded by the multiplication sign, the parentheses are removed and the invariant sign is removed, and the division sign is preceded by the parentheses. For example: 1 (6 2) = 1 6 2.

4.Multiplication Distributive Law:

1) In parentheses is the addition or subtraction operation, multiply with another number, pay attention to the distribution. For example: 8 (5+11)=8 5+8 11.

2) Extracting the common factor method. For example: 9 8+9 2=9 (8+2).

Easy to calculate.

The process is as above.

First of all, unify the symbols, decimals, fractions, and percentages, and then find the common divisor of each item and put it forward.

Original test = first find the same number, then convert all to decimals, and finally use the multiplicative distributive property to get the answer.

Hello, easy calculations using the multiplicative distributive property.

Original = 87 (101-1).