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How to Multiply by 12
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When teaching math,
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Hi! I'm Samantha Lake for About.com and today I'm going to show you How to Multiply by 12. We're here at "Count Me in Tutoring" in Bedford Corners, NY.When teaching math, repetition is important, many worksheets and times tables can be found online. Having a times table is great because children can work with it and practice.When teaching specifically to multiply by 12, it is helpful to have a times table where you can focus on the 12 column and row. 1 times 12 is 12, 2 times 12 is 24, 3 times 12 is 36 and so on. A good trick is to use the theory that multiplying by 10 is very easy for children to do. After multiplying by ten, they multiply by 2 and add together. So, let's take 12 times 4 as an example. We would first multiply 4 times 10, equaling 40. Than 4 times 2 equals 8 and 40 plus 8 equals 48. So, 12 times 4 equals 48.Following this same theory, let's take 12 times 7. So, 10 times 7 is 70 and 7 times 2 is 14. Now, add 70 plus 14 which equals 84, so 12 times 7 is 84. Now let's look at the traditional method of multiplying. So, instruct your students to stack the equation with 12 on top. So, let's use 12 times 3 as our equation to practice with. 12x3Start with multiplying 2 times 3, which equals 6 which is the second number in our answer. Then 1 times 3 equals 3, which is the first number in our answer, so the answer is 36.Have your students repeat this with many numbers and they will eventually be able to memorize the times table.
To learn more about math and other topics, please visit About.com. Thanks for watching.
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