[Home] [5] [11] [12-19] [15] [25] [50] [75] [101] [111] [125] [143] [167] [286] [375] [429] [572] [625] [715] [858] [875] [1001] [1111] [3367] [14443] [101101] [142857]
Multiplying By 101:
1. When multiplying a 2 digit number by 101, simply write the number down twice.
Ex [1] 53 x 101 = 5353.
Ex [2] 49 x 101 = 4949.
2. Sometimes there are variations of 101 like 201, 203, 104, etc. In problems like these you can use the following:
Ex [1] 23 x 203 =_________.
a) Multiply 23 x 2 = 46.
b) Multiply 23 x 3 = 69.
c) The answer is 4669.
3. When multiplying a 3 digit number by 101 the following rules apply:
a. Write down the last 2 digits of the number.
b. Take the number in the hundred’s digit and add back to the number.
Ex [1] 453 x 101 =_________.
a) Write 53.
b) 4 + 453 = 457. Write 457
c) The answer is 45753.
Ex [2] 998 x 101 =_________.
a) Write 98.
b) 9 + 998 = 1007. Write 1007.
c) The answer is 100798.