A double fact in math is a doubled value that is easy to remember, such as the equation "8 + 8 = 16." Any doubled number is a double fact, but double facts are most commonly used when they are small numbers, usually less than 12.
Continue ReadingThe reason teachers use double facts to teach students is because they provide a faster way to find the answer to addition problems that are not as easy to memorize. For example, rather than remembering that "8 + 9 = 17," students can use double facts to come up with the answer. In this case, a student would know that the double fact of eight is 16 and that nine is one more than eight. The students then needs to add one to 16 to get the answer. The student could also remember the double fact of nine and then subtract one to get the answer.
The same technique also works for larger numbers. If a student tries to find the answer to "15 + 18," the student needs to remember that the double fact of 15 is 30. Accordingly, the student then needs to add three to that answer to get the solution.
Learn more about Homework HelpTo review seventh-grade math, students may work from a seventh-grade textbook, review concepts online or visit a tutor. Many schools offer tutoring to students in need of assistance.
Full Answer >Math is not difficult for every student, but for some, the requirements for stamina, logical thinking and the ability to learn cumulatively can be a challenge. Students who have a difficult time in any or all of these areas may find themselves struggling with mathematics.
Full Answer >In math, the multiples of a number include all the numbers that result from multiplying that number by any whole number. A number's multiples include the number itself plus the numbers that are divisible by it without leaving a remainder.
Full Answer >To extrapolate a graph, you need to determine the equation of the line of best fit for the graph's data and use it to calculate values for points outside of the range. Alternatively, on simple line graphs, it is sometimes possible to extrapolate from a graph by using a straight edge, like a ruler, to read off a fairly accurate estimate of a nearby point.
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