http://www.aaastudy.com/mul310x7.htm
http://www.numbernut.com/basic/activities/mult_quiz_3x1carry-v.shtml
http://www.ixl.com/math/grade-5/multiply-a-2-digit-number-by-a-larger-number
ADVANCED .....How to multiply two and three-digit numbers ...... http://www.aaastudy.com/mul48ax2.htm
Multiplying three digit by one digit numbers
How to multiply a three digit number by a one digit number
(e.g. 312 * 3).
- Place one number above the other so that the ones' place digits are lined up. Draw a line under the bottom number.
312 3- Multiply the two ones' place digits. (2 * 3 = 6). Place the six below the line in the ones' place column.
312 3 6- Multiply the digit in the tens' place column (1) by the digit in the ones' place of the second number (3). The result is 1 * 3 = 3. Place the answer below the line and to the left of the 6.
312 3 36- Multiply the digit in the hundreds' place column (3) by the second number (3). The result is 3 * 3 = 9. Place the 9 below the line in the hundreds' place column.
312 3 936