Squaring a 2 digit number ending in 3
1.Take a 2-digit number ending in 3.
2.The last digit will be_____ _____9.
3.Multiply the first digit by 6: the 2nd number will be the next to the last digit:___ _____X 9.
4.Square the first digit and add the number carried from the previous step: XX______ _____ ____.
Example:
1.If the number is 43, the last digit is___ _____9.
2.6x4 =24(six times the first digit):________49.
3.4x4 =16(square the first digit), 16 + 2 = 18 (add carry): 1 8 4 9.
4.So 43 x 43 = 1849.
See the pattern?
1.For 83 x 83, the last digit is____ ____9.
2.6 x8 = 48 (six times the first digit):___ _____89.
3.8 x8 = 64 (square the first digit), 64 + 4 = 68(add carry): 6 8 8 9.
4.So 83 x 83 = 6889.
Notes
Vedic Maths - Notes
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