Multiplication by 5
If the number to be divided is
> EVEN :
Take its half and put a zero at the end
Ex. 348 X 5 = 1740 where 174 = 348/2
456824 X 5 = 2284120
> ODD :
Put a zero at the end and take its half
Ex. 467 X 5 = 4670/2 = 2335
23456789 x 5 = 117283945
Multiplication by 25 and 125
Te method is very simple.
HINT : 25 = 100/4
125 = 100/8
The procedure is as follows
1. Multiply the number by 100 or 1000
2. Divide it with 4 or 8 to obtain the multiplication of 25 and 125 respectively.
Ex. 27 X 25 = 2700/4 = 6750
4543 X 125 = 4543000/8 = 567875
LIKEWISE PRACTICE
