Multiplying two digit number by 101

1. Select a 2-digit number.
2. Write it twice!

Examples:

1. 47 × 101 = 4747.
2. 38 × 101 = 3838.
3. 96 × 101 = 9696.

Multiplying a 3-digit number by 101

1. Select a 3-digit number.
2. The sum of the first and third digits will be the middle digit: _ _ X _ _.
3. The first two digits plus the carry will be the first digits: X X _ _ _.
4. The last two digits of the number will be the last digits: _ _ _ X X.