Math Problem Statement
I don't understand how to do multiplication using my fingers
Solution
Multiplying numbers using your fingers can be a fun and helpful trick, especially for certain numbers. One common method is for multiplying numbers 6 through 10 using a technique known as the "finger multiplication method." Here's how you can do it:
Finger Multiplication for 6 through 10
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Label your fingers: On each hand, label your fingers from 6 to 10, starting with your thumb as 6 and moving to your pinky as 10.
Left Hand: 6 (thumb), 7 (index), 8 (middle), 9 (ring), 10 (pinky) Right Hand: 6 (thumb), 7 (index), 8 (middle), 9 (ring), 10 (pinky)
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Touch the fingers: To multiply two numbers, touch the fingers that represent those numbers together. For example, to multiply 7 by 8, touch your left hand's index finger (7) to your right hand's middle finger (8).
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Count the touching fingers and the fingers below: The fingers that are touching and all the fingers below those touching fingers represent tens. In our example, 7 x 8:
- Left hand: thumb (6), index (7)
- Right hand: thumb (6), index (7), middle (8)
Together, you have 5 fingers touching or below (index finger of left hand to middle finger of right hand).
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Count the remaining fingers: Multiply the number of fingers above the touching fingers on each hand. In our example:
- Above left hand index (7) is 3 (ring and pinky).
- Above right hand middle (8) is 2 (ring and pinky).
Multiply these remaining fingers: .
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Add the two results: The total multiplication result is the sum of the tens (from step 3) and the units (from step 4).
So, .
Would you like a more detailed example or do you have any other questions? Here are some more topics you might be interested in:
- How to multiply larger numbers using the grid method.
- Tips for quick mental math multiplication.
- Understanding the distributive property of multiplication.
- How to multiply fractions.
- Tricks for multiplying numbers ending in zero.
Tip: Practice this finger multiplication method with different combinations of numbers between 6 and 10 to become more comfortable with it.
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Math Problem Analysis
Mathematical Concepts
Multiplication
Finger Multiplication Method
Formulas
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Theorems
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Suitable Grade Level
Grades 3-5