Thursday, December 22, 2016

Multiply by 9 using your hands-Finger Math

Learning your times' tables is a foundational skill in order to be successful in Math. It is similar to learning your scales when playing music.
When memorizing your time's tables I have always found the numbers 7,8, and 9 challenging to memorize. In order to learn my 9 times table, I was taught this math trick which uses your fingers to memorize the 9 times tables. Here is how it works.

Step 1.Hold the hands up in front of you. Ensure that your fingertips are pointing up, that your hands are next to one another, and that your palms happen to be facing from your body. The hands are the basis for calculating the nines multiplication table.

Step 2. Starting at your pinkie on your left-hand number your fingers in a descending order one through 10.

Step 3. Identify the number that will be multiplied by 9. In the first example, I will use the number 4.

Step 4. Bend down the number you will be multiplying. In this example with multiplying 4 I will bend down the pointing finger on my left hand.

Step 5. Count all of the fingers to the right of the finger that was bent down. This number will be your ten value. In this example, there are 3 numbers to the right.

Step 6. Count the number of fingers to the right of the finger you folded down. This number will be your " ones" value. In this example, there are 6 numbers to the right of the finger folded down.

Step 7. Combine your ten value and the one's value for the total value.
Combine 30 and 6 for 36.

For example number 2 I will use this finger trick for multiplying 9's in order to multiply 9 x 7.

Step 1. Fold down finger number 7 which is the pointing finger on the right hand.

Step 2. I count six fingers to the left of this finger for a total of 60 for my tens value.

Step 3. I count 3 fingers to the right for my one's value.

Step 4. Add these two values and using this math trick I get 63.

Advantages of this math finger trick method.

  • Easy to remember
  • Fast and very visual
  • Improves your math skill set
  • Reduce mistakes when solving problems involving times tables.

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