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Online Pre-Algebra Tutoring: Number Division

Home | Online Math Tutoring | Pre-Algebra Tutoring | Divide by Powers of 10

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Learn  Number division  from Certified Online Pre-Algebra Tutor

When we divide a whole number by a power of 10, move the decimal point to the left the same number of places as the number of zeroes. If there is no digit add zero. The answer will have as many decimal digits as there are zeroes.

Let’s understand with the following example:

18 ÷ 100

To divide by a power of ten, move the decimal point to the left one place for each zero.

Count the zeroes in 100. There are 2 zeroes in 100. Start with 18. Move the decimal point 2 places to the left.

18. → 0.18

Write the answer:

18 ÷ 100 = 0.18

Check Point

  1. 6 ÷ 100
  2. 9 ÷ 10
  3. 365 ÷ 1000
  4. 5,743 ÷ 100
  5. 4 ÷ 1000
Answer key
  1.  0.06
  2.  0.9
  3.  0.365
  4.  57.43
  5.  0.004

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