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Multiplying A 2-digit Number By 2 3/8

Multiplying A 2-digit Number By 2 3/8

Multiplying a 2-digit number by 2 3/8

  1. Select a 2-digit number.
  2. Multiply the number by 2.
  3. Add a zero.
  4. Subtract the original number from this product.
  5. Divide the result by 8.
   Example:
  1. The 2-digit number chosen to multiply by 2 3/8 is 31.
  2. Multiply by 2: 2 × 31 = 62
  3. Add a zero: 620
  4. Subtract the original number from this product: 620 - 31 = 589
  5. Divide by 8: 589/8 = 73 5/8
  6. So 31 × 2 3/8 = 73 5/8.

   See the pattern?

  1. If the 2-digit number chosen to multiply by 2 3/8 is 54:
  2. Multiply by 2: 2 × 54 = 108
  3. Add a zero: 1080
  4. Subtract the original number from this product: 1080 - 54 = 1026
  5. Divide by 8: 1026/8 = 128 2/8
  6. So 54 × 2 3/8 = 128 1/4.




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26 Sep, 2021, 02:05:08 AM