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How do you write numbers in standard form?

For example, the standard form of the number 3,692,000 is 3.692 x 10^6. This method of notation allows any trailing zeros to be ignored, so it saves space when dealing with larger numbers. It is also possible to reflect very small numbers by using negative powers of 10 to remove lead zeros. In this way, 0.00045 becomes 4.5 x 10^-4, for example.

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What are some good percentage calculators?

Jari Jokinen's and the Math Easy Solutions percentage calculators allow users to fill in the blanks of common percentage-related word problems and get the solutions. The Math Easy Solutions percent calculator also converts mixed fractions to percentages and multiplies or divides numbers by percentages.\nThe Math Is Fun percentage calculator allows a user to enter two numbers, and the calculator tells the user what percent each number is of the other number and the percentage increase or decrease from one to the other.

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Where can second-grade math materials be found?

In addition to its downloadable materials, K5 Learning offers fee-based online math and reading programs for children at the kindergarten through fifth-grade levels. The online programs are designed to allow children to progress at their own pace and are suitable for homeschooling, after-school study and for gifted or special-needs students, as noted on the company website. No-fee downloadable second-grade worksheet categories include counting money, telling time, measurement and price value and rounding. Many of the K5 Learning worksheets make use of pictorial representations, such as currenc..

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What are some mathematical basic number properties?

The commutative property applies to addition and multiplication of numbers and basically states that the order of addition or multiplication does not affect the answer. For example, 15 + 14 = 29, and 14 + 15 = 29. Likewise, 10 x 12 = 120, and 12 x 10 = 120. The same principle holds true no matter how many numbers are added or multiplied together.\nThe associative property also applies to addition and multiplication. This property states that it does not matter which numbers are grouped together in an addition or multiplication problem containing three or more addends or factors. For example, (..

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What is an example of a basic hypothesis test?

An example given by the Khan Academy tests the hypothesis that a particular breeding pair of dogs will give birth to more male than female puppies in any given litter. A data table is constructed showing the distribution of male puppies per litter over 1,000 litters. From that data it is possible to use mathematics processes to validate or invalidate the hypothesis.

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What is a double bar graph?

The bars on a double bar graph can be placed vertically or horizontally. Often, a bar graph has an axis that is labeled with categories and an axis labeled with numerical values. Bar graphs represent categorical data. For example, the labels can be countries, genders, age groups, races or time periods.\nA double bar graph uses discrete values. The chart is made large enough to fit all of the data for each category.

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What are some useful tips for solving pre-algebra questions?

One of the big difficulties of transitioning from regular arithmetic to pre-algebra is understanding how the basic math concepts apply in complex situations. Pre-algebra problems frequently include word problems, which often stump students.\nAn important element to solving word problems is understanding the solution that the problems requires. In pre-algebra problems, it is also necessary to understand the missing variables. Often, an algebra word problem gives the ultimate solution, but asks for some other part of the problem. It is therefore important to understand which equation is necessar..

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What methods can be used in evaluating logarithms?

Sums and differences of logarithms with the same base are combined into one expression using the following rules. First, the sum of two logarithms is equal to the logarithm of the product of the two arguments. Second, the difference of two logarithms is equal to the logarithm of the quotient of the two arguments.\nSome logarithms can be removed from the expression. For instance, the logarithm of one with any base is always equal to zero. A logarithm that has the same base and argument is equal to one. Logarithms of scalars rather than variables can be rewritten as numerical values if the logar..

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How is trigonometry used in astronomy?

When an object is seen from two different vantage points, the object appears to change positions compared to the background objects. For instance, when you place your finger in front of your face and look at it with your left eye then your right eye, the position of your finger appears to change compared to the distant objects in the background. The effect is called parallax, or trigonometric parallax in astronomy. It is so named because the lengths of the sides of a triangle and its angles are used to calculate the lengths of all the sides of the triangle. To measure the distance in outer spa..

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How many zeros are there in a billion?

The long scale definition describes that one billion is a million times larger than one million and that a billion means a million million. The short scale definition describes that the number one billion is a thousand times larger than one million and that a billion means a thousand million.

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