作者：Ashley Wallace 9 年以前
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The goal of this map is to provide examples, videos, and games for students in K-6 who are learning about fractions.
Fractions are written x/y, where x is the numerator and y is the denominator.
Fractions can be thought of as a number representing a portion of a whole.
When dividing fractions, there are three different situations that need to be considered. The common-numerator rule states that a/b / a/c = c/b. This is the case becuause when a/b is multiplied by the reciprocal of a/c, which is c/a, the a's cancel out. The common denominator rule a/b / c/b = a/c. This is the case because when a/b is multiplied by the reciprocal of c/b, which is b/c, the b's cancel out. The invert-and-multiply rules states that a/b / c/d = a/b x d/c.
This site allows you to practice fraction division problems on your own. There is a guided solution provided to assist in solving the problems.
This is a fraction division game that is centered around the game of basketball. You get to try to make the basketball in the basket and then in order for the point to count, a fraction problem needs to be answered correctly.
Subtracting fractions requires that the denominator in all of the fractions that are being added together are the same. If the demoninators are not the same, the LCM (least common multiple) of the denominators need to be found. Watever factor the denominator needs to be multiplied by, the numerator needs to be multiplied by that factor as well. Once the denominators are the same, the numerators can be subtracted from each other.
(We will take a look at an example of this in the example branch)
A winter fraction subtraction game where the goal is to try and see how many problems can be answered right in the time allowed.
This is a practice activity where students are able to try out a ton of fraction subtraction problems on their own.
Unlike adding and subtracting fractions, we do not need to find a common denominator when multiplying fractions. The numerators of all of the fractions that are being multiplied together are mutiplied to give a final product in the numerator position. The denominators of all of the fractions that are being multiplied together are multiplied to give a final product in the numerator postition.
(We will take a look at an example of this in the example branch)
Multiplication game where you race amongst other sleds to try to be the first to the finish line by getting multiplication problems correct.
Adding fractions requires that the denominator in all of the fractions that are being added together are the same. If the demoninators are not the same, the LCM (least common multiple) of the denominators need to be found. Watever factor the denominator needs to be multiplied by, the numerator needs to be multiplied by that factor as well. Once the denominators are the same, the numerators can be added together.
(We will take a look at an example of this in the example branch)
This soccer fraction addition game allows players to pracitce problems according to the difficultly level selected. When a problem is answered incorrectly, a guided solution follows.
This is a fruit popping game that students need to get fraction addition problems right in order to pop the fruit with the right answer. The game has many different levels and settings depending on how advanced a person wants it.
