Dividing Tens How to divide a number that consists of even tens by another number:
- Move the decimal point of the dividend one place to the left
- Do the division.
- Move the decimal point of the quotient one place to the right
Division How to divide a two digit number by a one digit number (e.g. 42 ÷ 7).
- Place the divisor (7) before the division bracket and place the dividend (42) under it.
7)42
- Examine the first digit of the dividend(4). It is smaller than 7 so it can't be divided by 7 to produce a whole number. Next take the first two digits of the dividend (42) and determine how many 7's it contains. In this case 42 holds six sevens (6*7=42). Place the 6 above the division bracket.
6
7)42
Multiply the 6 by 7 and place the result (42) below the 42 of the dividend.
6
7)42
42
Draw a line under the 42 and subtract it from 42 (42-42=0). Since the result is 0 the division is finished and 6 is the answer.
Dividing Hundreds How to divide a number that consists of even hundreds by another number:
- Move the decimal point of the dividend two places to the left
- Do the division.
- Move the decimal point of the quotient two places to the right
Division How to divide a three digit number by a one digit number (e.g. 416 ÷ 7).
- 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 it 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
Reference: http://www.aaamath.com/div.html
