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Multiplying A 2-digit Number By 3 1/6

Multiplying A 2-digit Number By 3 1/6

Multiplying a 2-digit number by 3 1/6

  1. Select a 2-digit number.
  2. Multiply the number by 20.
  3. Subtract the original number.
  4. Divide by 6.
   Example:
  1. The 2-digit number chosen to multiply by 3 1/6 is 31.
  2. Multiply by 20: 20 × 31 = 620
  3. Subtract the original number: 620 - 31 = 589
  4. Divide by 6: 589/6 = 98 1/6
  5. So 31 × 3 1/6 = 98 1/6.

   See the pattern?

  1. The 2-digit number chosen to multiply by 3 1/6 is 90.
  2. Multiply by 20: 20 × 90 = 1800
  3. Subtract the original number: 1800 - 90 = 1710
  4. Divide by 6: 1710/6 = 285
  5. So 90 × 3 1/6 = 96 285.




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22 May, 2019, 22:07:30 PM