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How can adding doubles help a person multiply by 2?

Addition is the basic operation taught students in the lower grades. When children learn how to add 1 + 1, 2 + 2 and up to 10 + 10, this is the principle of doubling a number. Children also learn the definition of multiplication as being repeated addition.It is important to show students that two times a number is the same as adding doubles. For example, 2 x 4 or twice four is the same as adding two fours or 4 + 4.Teaching students the doubling principle is useful because students do not have to memorize multiplication. By incorporating visual aids and games to teach these principles, students..

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What percentage of high school athletes go pro?

In a survey conducted by the NCAA, the organization gauged the likelihood of high school students joining collegiate and professional athletics in six major sports, including baseball, men's basketball, women's basketball, football, men's hockey and men's soccer.The results of the study showed that of the 482,629 high school baseball players, only 6.9 percent plays in college, which is equivalent to 33,301 students. Only 8.6 percent of this tertiary population, or around 2,864, are picked by major league baseball teams. For men's basketball, there are 541,054 players i..

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What is a 20-sided shape called?

Notably, when contestants spin the "Big Wheel" on the popular long-running TV game show "The Price Is Right," they are spinning an icosagon-shaped wheel. In addition, the outdoor theater where William Shakespeare and his acting company performed, the Globe, was built on an icosagon-shaped foundation.\nPolygons with three to 20 sides are named with a Greek prefix and the "gon" suffix. For example, an eight-sided polygon is called an octagon, formed from the Greek "octa" and the suffix "gon."

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How do you divide a circle with eight equal pieces with three straight lines?

Divide the circle in halfDraw a light mark at the center of the circle you wish to partition. Use a ruler to draw a horizontal line across this mark. The line is a diameter that divides the circle into two parts. Divide the circle into quartersPlace a ruler so that it is perpendicular to the mark. Draw a line from the circle’s top to its bottom so that it splits into four equal parts.Separate the parts, and rearrange themUse a pair of scissors to cut along the diameters in order to separate the pieces. Place these pieces on top of each other so that they form a stack.Create the eight piecesL..

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How do you multiply polynomial fractions?

Factor all of the polynomialsFactor the polynomials in both fractions of the problem. If given the expression, ((x^2 + 2x - 3) / (2x^2 + 2x - 4)) * ((x^2 + 7x + 10) / (x^2 + 4x + 3)), factor out both the numerator and the denominator. It is possible to multiply out the polynomials without factoring them; however, this makes simplification very difficult.Cancel any like termsOnce the expression is factored out to resemble (((x + 3) * (x - 1)) / (2 * (x - 1) * (x + 3))) * (((x + 2) * (x + 5)) / ((x + 1) * (x + 3))), cancel any like terms. Cancellation is valid between the numerator and denominat..

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Does an isosceles triangle have rotational symmetry?

A shape or image with rotational symmetry is one that can be rotated by some degree amount and still appear the same. In the case of an equilateral triangle, the shape remains the same each time the triangle is rotated by 120 degrees. As a subset of isosceles triangles, equilateral triangles have rotational symmetry.

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What is the antiderivative of 2x?

Antiderivatives are similar to integrating a function. When taking the derivative of a polynomial term such as ax^n, where a and n are real numbers, the derivative is anx^(n-1). Multiply by the power and reduce the power of x by 1. The same formula can be used regardless of the number of terms in the polynomial if the terms are all in this form. A constant without an x term is simply zero.\nThe antiderivative is the opposite of the derivative. Where the derivative required multiplying by the power and reducing that power by 1, it is necessary to do the opposite in the antiderivative; raise the..

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What concepts are introduced in second grade in the Go Math program?

The 11 chapters include the following: Number Concepts, Numbers to 1,000, Basic Facts and Relationships, 2 Digit Addition, 2 Digit Subtraction, 3 Digit Addition and Subtraction, Money and Time, Length in Customary Units, Length in Metric Units, Data and Geometry. Each student is given a copy of the text and a practice workbook. Online tools and manipulatives are also made available to each student if they are having difficulty with a lesson.\n\nEarly chapters of the text are built in to act as a reminder of past lessons each student should have become familiar with and mastered in the first gr..

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How does one consider the differential equation?

For example, if y is the unknown function and t the independent variable, then an example of a differential equation would be dy/dt=f(y, t). Such a problem can be solved by finding the initial condition, such as y(0)=y0.\nOften, differential equations enter applications as evolution equations. Thus, the independent variable is time, and the equation describes how some physical quantity evolves in time. If the right-hand side of the differential equation does not depend on y, then the differential equation can be solved using basic integration techniques. For example, if dy/dt=f(t), then y equ..

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What is the definition of "Solomon four-group design"?

This test design is more difficult to set up, but it usually yields better results because it allows the tester to check and account for biases and outside variables. The standard pre-test/post-test design enables the tester to control the variables for the groups, but this does not account for the testing itself and other variables. The four extra tests performed (beyond just pre- and post-test) are a test without the treatment, but with post- and pre-testing, one with treatment and post-test but no pre-test, and one with only the pre-test.\nThis experimental design method is particularly use..

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