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Dividing A 2- Or 3-digit Number By 33 1/3

Dividing A 2- Or 3-digit Number By 33 1/3

Dividing a 2- or 3-digit number by 33 1/3

  1. Select a 2-digit number (progress to larger ones).
  2. Multiply it by 3.
  3. Move the decimal point 2 places to the left.
   Example:
  1. The 2-digit number chosen to divide by 33 1/3 is 46.
  2. Multiply by 3: 3 × 46 = 3(40 + 6) = 120 + 18 = 138
  3. Move the decimal point 2 places to the left: 1.38
  4. So 46 divided by 33 1/3 = 1.38.
    (If you divide by 33.3 using a calculator, you will not get the exact answer.)

   See the pattern?

  1. If the 3-digit number chosen to divide by 33 1/3 is 650:
  2. Multiply by 3: 3 × (600 + 50) = 1800 + 150 = 1950
  3. Move the decimal point 2 places to the left: 19.50
  4. So 650 divided by 33 1/3 = 19.5.

Practice multiplying left to right and this procedure will become an easy one - and you will get exact answers, too.





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26 Jul, 2021, 19:06:38 PM