Two digit multiplication with 25

Two digit Multiplication with 25

When you are multiplying with 25, you need to remember table 4 and table 25.

Table 4 is for division and Table 25 for multiplication.

Just you need to remember
25 x 1 = 25
25 x 2 = 50
25 x 3 = 75

Let me take one example

Ex 1. 13 x 25 = ?

Take 13 and divide with 4.

There are 3 fours in 13 and remainder is 1

result = 3x100 + 25 x 1 = 300 + 25 = 325

So you need to find how many 4s are there in the number and what is remainder.

Let us try one more example

Ex 2 : 22 x 25 = ?

5 fours are there in 22 and remainder is 2

result = 500 + 2 x 25 = 550

Rule is simple

step 1 : find remainder and how many fours are there in the number

step 2 : no. of 4s x 100 + remainder x 25

Let me take two more examples

Ex 3 : 35 x 25 = 8 x 100 + 3 x 25 = 875
Ex 4 : 48 x 25 = 12 x 100 + 0 x 25 = 1200

conclusion :

if remainder is 0 last two digits 00

if remainder is 1 last two digits 25

if remainder is 2 last two digits 50

if remainder is 3 last two digits 75

Last example

Ex 5: 81 x 25 =  2025
Similar way we can do for 50. Lets see this in next post