Tuesday, February 3, 2009

Division

Dividing a three digit number by a one digit number (for example 416 ÷ 7) involves several steps.
  • Place the divisor before the division bracket and place the dividend (416) under it.


  • 7)416

  • Examine the first digit of the dividend(4). It is smaller than 7 so can't be divided by 7 to produce a whole number. Next take the first two digits of the dividend (41) and determine how many 7's it contains. In this case 41 holds five sevens (5*7=35) but not six (6*7=42). Place the 5 above the division bracket.

  • 5
    7)416

  • Multiply the 5 by 7 and place the result (35) below the 41 of the dividend.

  • 5
    7)416
    35

  • Draw a line under the 35 and subtract it from 41 (41-35=6). Bring down the 6 from the 416 and place it to the right of the other 6.

  • 5
    7)416
    35
    66

  • Divide 66 by 7 and place that answer above the division bracket to the right of the five.

  • 59
    7)416
    35
    66

  • Multiply the 9 of the quotient by the divisor (7) to get 63 and place this below the 66. Subtract 63 from 66 to give an answer of 3. The number 3 is called the remainder and indicates that there were three left over.

  • 59 R 3
    7)416
    35
    66
    63
    3

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