Multiplying a 2, 3, 4, or 5digit number
by
100001
1. The product of a 2digit number and 100,001
is:
first the two digits,
then three zeros,
then the two digits again.
Examples:
12 × 100001 = 1200012
79 × 100001 = 7900079
2. The product of a 3digit number and 100,001
is:
first the three digits,
then two zeros,
then the three digits again.
Examples:
386 × 100001 = 38600386
914 × 100001 = 91400914
3. The product of a 4digit number and 100,001
is:
first the four digits,
then one zero,
then the four digits again.
Examples:
6295 × 100001 = 629506295
8106 × 100001 = 810608106
4. The product of a 5digit number and 100,001
is:
first the five digits,
then the five digits again.
Examples:
12345X100001 = 1234512345
98765X100001 = 9876598765
Your friends will need a BIG calculator to keep up with you when you announce
these products!
