Squaring a 2 digit number ending in 4
1.Take a 2-digit number ending in 4.
2.Square the 4; the last digit is 6:________6 (keep carry, 1.)
3.Multiply the first digit by 8 and add the carry (1); the 2nd number will be the next to the last digit: _ X 6 (keep carry).
4.Square the first digit and add the carry: XX_______.
Example:
1.If the number is 34. 4x4 = 16 (keep carry, 1);the last digit is_____6.
2.8 x 3 = 24 (multiply the first digit by 8), 24 + 1 = 25 (add the carry): the next digit is 5:____________5 6. (Keep carry, 2.)
3.Square the first digit and add the carry, 2: 1 1 5 6.
4.So 34 x 34 = 1156.
See the pattern?
1.For 84 x 84, 4 x 4 = 16 (keep carry, 1); the last digit is_____6.
2.8 x 8 = 64 (multiply the first digit by 8), 64 + 1 = 65 (add the carry): the next digit is 5:____________5 6. (Keep carry, 6.)
3.Square the first digit and add the carry, 6: 7 0 5 6.
4.So 84 x 84 = 7056.
Notes
Vedic Maths - Notes
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41. Squaring a 2 digit number ending in 1
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