Monday, January 6, 2020
10 Magical Multiplication Tricks to Teach Kids to Multiply
Not all kids are able to learnà multiplication facts using rote memorization. Luckily, there are 10 multiplication magic tricks to teach kids to multiply and many multiplication card games to help. In fact, research has shown that rote memorization doesnââ¬â¢t help kids to learn the connections between numbers or understand the rules of multiplication. Practically-based math, or finding ways to help kids do math activities in real life, is more effective than just teaching the facts. Represent multiplication Using things like blocks and small toys can help your child see that multiplication is really a way to add more than one group of the same number over and over again. For example, write the problem 6 x 3 on a piece of paper, and then ask your childà to create six groups of three blocks each. She will then see what the problem is asking us to put together six groups of three. Practice doubles facts The ideaà of ââ¬Å"doublesâ⬠is almost magical in itself. Once your child knowsà the answers to her ââ¬Å"doublesâ⬠addition facts (adding a number to itself) she magically knows the twos times table as well. Justà remind her that any number multiplied by two is the same asà adding that number to itselfââ¬âthe problem is asking how much are two groups of that number. Skip-counting to five facts Your child may already know how to count by fives. What she may not know is that by counting by five, sheââ¬â¢s actually reciting the fives times table. Demonstrate that if she uses her fingers to keep track of how many times sheââ¬â¢s ââ¬Å"countedâ⬠by five, she can find the answer to any fives problem. For instance, if heââ¬â¢s counted by five up to twenty, heââ¬â¢ll have four fingers held up. Thatââ¬â¢s actually the same as 5 x 4! Magical Multiplication Tricks There are other ways to get the answers that arenââ¬â¢t as easy to see through. Once your child knows how to do the tricks, sheââ¬â¢ll be able to amaze her friends and teachers with her multiplication talent. Magically Multiplying Zero Help your child write out theà 10 times table and then ask if she notices a pattern. What she should be able to see is that when multiplied by the number 10, a number looks like itself with a zero on the end. Give her a calculator to try it out using large numbers. Sheââ¬â¢ll see that every time she multiplies by 10, thatà zero ââ¬Å"magicallyâ⬠appears on the end. Multiplying by zero doesnââ¬â¢t seem all that magical. Itââ¬â¢s hard for kids to understand that when you multiply a number by zero the answer is zero, not the number you started with. Help your child understand that the question really is ââ¬Å"How much is zero groups of something?â⬠and sheââ¬â¢ll realize the answer is ââ¬Å"Nothing.â⬠Sheââ¬â¢ll see how the other number disappeared. Seeing Double The magic of the 11 times tables only works with single digits, but thatââ¬â¢s okay. Show your child how multiplying by 11 always makes you see the double of the number sheââ¬â¢s multiplying. For instance, 11 x 8 88 and 11 xà 6 66. Doubling Down Once your child has figured out the trick to her twos table, then sheââ¬â¢ll be able to make magic with fours. Show her how to fold a piece of paper in half lengthwise and unfold it to make two columns.à Ask her toà write her twos tables in one column and the fours table in the next column. The magic that she should see is that the answers are the doubles doubled. That is, if 3 x 2 6 (the double), then 3 x 4 12. The double is doubled! Magic Fives This trick is a little odd, but only because it only works with odd numbers. Write down the fives multiplication facts that use an odd number and watch as your child finds the magical oddity. She may see that if she subtracts one from the multiplier, ââ¬Å"cutsâ⬠it in half and puts a five after it, thatââ¬â¢s the answer to the problem. Not following? Look at it like this:à 5 x 7 35, which is actually 7 minus 1 (6), cut in half (3) with a 5 on the end (35). Even More Magic Fives Thereââ¬â¢s another way to make the fives tables appear if you donââ¬â¢t want to use skip-counting. Write down all the fives facts that involve even numbers, and look for a pattern. What should appear before your eyes are that each answer is simply half of the number your child is multiplying by five, with a zero on the end. Not a believer? Check out these examples:à 5 x 4 20, and 5 x 10 50. Magical Finger Math Finally, the most magical trick of allââ¬âyour child just needs her hands to learn the times tables. Ask her to put herà hands face down in front of her and explain that the fingers on theà left hand represent the numbers 1 through 5. The fingers on the right hand represent the numbers 6 through 10. And, for theà first trick, ask her to fold down the indexà finger on his left hand, or finger number 4.Remind her that 9 x 4 36, and then have her look at her hands.à To the left of her bent finger, there are 3 fingers. To the right are her remaining 6 fingers.The magic to this trick is that the number given to the finger that she folds downà x 9 is equal to the number of fingers to the left of the bent finger (in the tens place) and the fingers to the right (in the ones place.) Recalling theà answers to multiplication facts is a key skill your child will need to master in order to move on to more complicated types of math. Thatââ¬â¢s why schools spend so much time trying to make sure that kids can pull up the answers as quickly as possible.
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