find 249×251 without actual multiplication.
Answers
Answered by
43
Hello dear!!!
Here's your answer....
We have to use formulas....
249×251
(250-1)(250+1)
It is in the form of (a-b)(a+b)
(250)^2 - (1)^2
62500-1
62499
This is the answer...
62499 is the product of 249×251.
Hope this helps you
:) :) :)
Here's your answer....
We have to use formulas....
249×251
(250-1)(250+1)
It is in the form of (a-b)(a+b)
(250)^2 - (1)^2
62500-1
62499
This is the answer...
62499 is the product of 249×251.
Hope this helps you
:) :) :)
sacchu2:
its is tatally correct ans.so thnq so much
totally*
Answered by
16
249 x 251
(200x49)(200+52)
(a+b)(a+c) = a sq.+ a(b+ c) + bc
200 x 200 + 200 (49 + 51) + 49 x 51
40000 + 200 x 100 + 2499
40000 + 20000 + 2499
62499
(200x49)(200+52)
(a+b)(a+c) = a sq.+ a(b+ c) + bc
200 x 200 + 200 (49 + 51) + 49 x 51
40000 + 200 x 100 + 2499
40000 + 20000 + 2499
62499
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