To multiply two numbers ending in 5, use the formula: 100(a×b) + 50(a+b) + 25, where a and b are the tens digits of the two numbers. For example, 25×45 = 100(2×4) + 50(2+4) + 25 = 800 + 300 + 25 = 1125, and 35×95 = 100(3×9) + 50(3+9) + 25 = 2700 + 600 + 25 = 3325.
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Deep Dive
MULTIPLICATION WITH END DIGIT 5 | #WILPOWER | #mathtricks | #vedicmaths |Added:
Hello folks, welcome to my channel.
Going to learn multiplication with nd digit 5.
The formula we are going to use is 100 a b + 50 a + b + 25.
For example, 25 into 45 and 35 into 95.
Let me explain how this work.
to use the formula 100 AB plus 50 a + b + 25.
We must know what is the a and b.
25 into 45.
2 is a 4 is b.
Now let us substitute that here.
A = 2 b = 4.
Now let us substitute in the formula.
100 into 2 into 4 + 50 into 2 + 4 + 25.
Now it will be 800 + 65 300 + 25.
Now the total will be 1 1 2 5 and next question 35 into 95 same a = 3 b = 9.
Now let me explain this again.
100 into a b + 50 into a + b + 25.
Now by this 100 into 3 into 9 + 50 into 3 + 9 + 25.
Now three 9s 27 and 50 + 12 50 into 12 25 2700 + 600 + 25.
Now let us sum on this sum will be 3325.
That's all.
Thanks for watching our channel and subscribe to our channel.
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