Question

Find 15×13 by splitting the numbers

Answer 1

Answer:

Step-by-step explanation:

15 =3*5

13=13*1

15*13=3*5*13

        =39*5

        =(40-1)*5

        =40*5-5*1

        =200-5

        =195

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Answer 2

Answer:

195

Step-by-step explanation:

15 * 13 can be written as:

(10 + 5)(10 + 3)....................(x + a)(x + b) = x^2 + (a+b)x + ab

here, x=10; a=5; b=3

= 10^2 + (5 +3)10 + 5*3

= 100+ 80 + 15

=> 195