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The sign rule of rational number multiplication 1. Calculate the following formula, and find out the sign rule of product? By multiplying several unequal zero numbers, the product is signed by________ The number of factors determines that when there are odd negative factors, the product is________ When there are even negative factors, the product is________ .
Negative, negative and positive (note that the same sign is positive, the multiplication of two negative numbers is a positive number, and one more is a negative number)
Rational power calculation, urgent 2-2^2-2^3-2^4-...-2^2007+2^2008
Six
You can start at the end:
2-2^2-2^3-2^4-...-2^2007+2^2008
The last two items are as follows:
2^2007
After calculation, we will push forward one item: -... - 2 ^ 2006 + 2 ^ 2007
...
and so on:
Finally, there are:
2-2^2+2^3
The results are as follows:
2+2^2
The result was 6
5 mixed operations of rational multiplication There must be a power in the title It's a mixture of four operations~
1、3³*2²+12
2、15²-5²+10
3、(3/4)+(1/2)²-1
4、8/15-2³/30+11/15
5、5/18-5³+3²-5/36
The calculation of the power of rational number
98 * 2 + 56) / 4 - (- 1)
4 * (- 113) + - 5 * 123-137 * 4-77 * 5 * (- 1)
-5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
Simple rule of fractional multiplication
When a fraction is multiplied by an integer, the numerator of the fraction is used as the numerator, and the product of the multiplication of the numerator is used as the numerator, and the product of the numerator multiplied by the denominator is used as the denominator
The problem of rational multiplication -Is the quadratic square of (- 2) = - (- 12) × - (- 12) or = - (- 12) × (- 12)?
In theory
-The quadratic square of (- 12) = - (- 12) × (- 12)
This is because the square of - 12 is the opposite of the square of - 12!
And - (- 12) × (- 12) means exactly this!
However, the square of (- 2) = - (- 12) × - (- 12)
The equation holds!
But it's just a numerical calculation. It doesn't make any sense!
How is the formula of rational number multiplication? such as thirty-nine thousand nine hundred and forty-six How to calculate without Jane? Today's answer adopted and give you 50 extra wealth It's three to the power of 9946
9946=2×4973
3^9946=(3^2)^4973
Note: 4973 is prime number
The law contained in the power of rational number 1 3 = 1? 2, 1? 3 + 2? 3 = 3? 2, 1? 3 + 2? 3 = 6? 2, 1? 3 + 2? 3 + 4? 3 = 10? 2,... If 1? 3 + 2? 3 +... + 2012? 3 = a? 2, find the positive value of A
1³=1²,1=1
1³+2³=3²,3=1+2;
1³+2³+3³=6²,6=1+2+3
1³+2³+3³+4³=10²,10=1+2+3+4
1³+2³+3³+...+2012³=a²,
a=1+2+3+...+2012
=(1+2012)*(2012/2)
=2013*1006
=2013*1000+2013*6
=2013000+12078
=2025078
On the power of rational numbers What's the difference between rational multiplication and brackets? For example (- three quarters) of the three and - three quarters of the three I really don't understand what is two numbers with brackets and one number without brackets I don't understand
The operation level of the power is high, and the operation level of (3 / 4) ^ 3 is 27 / 64, and 3 ^ 3 / 4 = 27 / 4, so the power is calculated first, and then the division
Two problems of rational multiplication If the square of a number is equal to 1 / 64, then the number is -. If the cube of a number is equal to 1 / 64, then the number is - 2. Explore the law: the first power of 3 = 3, the digit is 3; the 2nd power of 3 = 9, the digit is 9; the 3rd power of 3 = 7, the digit is 7; the 4th power of 3 = 81, the digit is 1; the 5th power of 3 = 243, the digit is 3; the 6th power of 3 = 729, the digit is 9. Then what is the digit of the 7th power of 3, and what is the digit of 3 to the power of 2008
If the square of a number is equal to 1 / 64, then the number is 1 / 8. If the cube of a number is equal to 1 / 4.2.3, the digit of the 7th power is 7, and the digit of 3 to the power of 2008 is 1
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