Squaring a 2 digit number ending in 9
1.Choose a 2-digit number ending in 9.
2.The last digit of the answer is always 1:____ ____1
3.Multiply the first digit by 8 and add 8 (keep the carry):____ ____X _
4.Multiply the first digit by the next consecutive number and add the carry: the product is the first two digits: XX__ _____.
Example:
1.If the number is 39:
2.The last digit of the answer is 1:___ ___ ___1
3.Multiply the first digit (3) by 8 and add 8 (keep the carry): 8 x 3 = 24, 24 + 8 = 32; the next digit of the answer is 2 (keep carry 3):____ ____2 1
4.Multiply the first digit (3) by the next number (4) and add the carry (3): 3 x 4 = 12. 12 + 3 = 15 (the first two digits): 1 5 _
5.So 39 x 39 = 1521.
See the pattern?
1.For 79 x 79
2.The last digit of the answer is 1:___ ___ ___1
3.Multiply the first digit (7) by 8 and add 8 (keep the carry): 8 x 7 = 56. 56 + 8 = 64; the next digit of the answer is 4 (keep carry 6):___ _____4 1
4.Multiply the first digit (7) by the next number (8) and add the carry (6): 7 x 8 = 56, 56 + 6 = 62 (the first two digits): 6 2 _
5.So 79 x 79 = 6241.
(Practice other examples using this pattern, and in no time you'll be able to give these squares faster than someone using a calculator.)
Notes
Vedic Maths - Notes
3. Multiplying two 2 digit numbers difference of 6
Show Notes
4. Multiplying two 2 digit numbers difference of 4
Show Notes
5. Squaring a 2 digit number beginning with 1
Show Notes
10. Square 2 Digit Number with up down Method
Show Notes
12. Simple trick to remember table of 19
Show Notes
13. Multiply any two digit number with 11
Show Notes
14. Multiplying two 2 digit numbers difference of 3
Show Notes
15. Squaring a 2 digit number ending in 2
Show Notes
18. find square of a number between 50 and 60
Show Notes
19. Squaring a 2 digit number ending in 4
Show Notes
21. Multiplying two selected 3 digit numbers middle digit 1
Show Notes
22. Likewise you can find out square of a number that is one less than the number whose square is known
Show Notes
23. Squaring a 2 digit number ending in 3
Show Notes
25. Digital Sums For Multiplication By Eleven
Show Notes
26. Multiplying two 2 digit numbers difference of 8
Show Notes
31. Vertically and Crosswise To find 26 Multiplied by 31 in One Line we need to look at a Pattern
Show Notes
32. Squaring a 2digit number ending in 8
Show Notes
33. Squaring a 2 digit number beginning with 9
Show Notes
35. Multiply any two numbers from 11 to 20 in your head Take 15 x 13
Show Notes
36. Multiplying two selected 3 digit numbers middle digit 0
Show Notes
37. Convert Fahrenheit to Celsius and vice versa
Show Notes
38. Lets add 1 hr and 35 minutes and 3 hr 55 minutes together
Show Notes
39. Squaring a 2 digit number ending in 1
Show Notes
40. Squaring a 2 digit number ending in 5
Show Notes
41. Multiplying two 2 digit numbers difference of 10
Show Notes
42. This little math trick will show you whether a number is divisible by four or not
Show Notes
43. How to multiply 123 and 321 in one go
Show Notes
44. Multiplying two 2 digit numbers difference of 1
Show Notes
45. The Squaring of Numbers Ending in 5
Show Notes
47. Squaring a 2 digit number ending in 6
Show Notes
48. Squaring a 2 digit number ending in 7
Show Notes
50. Multiplying two 2 digit numbers difference of 2
Show Notes
