Multiplying two 2 digit numbers difference of 10
1.Choose a 2-digit number.
2.Select a number either 10 smaller or 10 larger.
3.Find the middle number of the two (the average).
4.Square this middle number (multiply it by itself).
5.Subtract 25 from this square.
Example:
1.If the first number is 36, choose 26 as the second number (10 smaller).
2.The middle number (the average) is 31.
3.Square this middle number: 31 x 31 = 961.(Remember how to square a 2-digit number ending in 1?)
4.Subtract 25 from this square: 961 - 25 = 936 (subtract mentally in steps: think 961 - 20 - 5 = 941 - 5 = 936).
5.So 36 x26 = 936.
See the pattern?
1.If the first number is 78, you might pick 88 as the second number (10 larger).
2.The middle number (the average) is 83.
3.Square this middle number: 83 x 83 = 6889. (Remember how to square a 2-digit number ending in 3?)
4.Subtract 25 from this square: 6889 - 25 = 6864 (subtract mentally in steps: think 6889 - 20 - 5 = 6869 - 5 = 6864).
5.So 78 x 88 = 6864.
Remember to subtract in easy steps and pick your number to get an easy square. With practice you will be a whiz at getting these products.
Notes
Vedic Maths - Notes
2. Square 2 Digit Number with up down Method
Show Notes
3. Multiplying two 2 digit numbers difference of 4
Show Notes
4. Squaring a 2 digit number ending in 2
Show Notes
5. Multiplying two 2 digit numbers difference of 6
Show Notes
6. Squaring a 2 digit number ending in 3
Show Notes
7. Squaring a 2 digit number beginning with 1
Show Notes
12. Squaring a 2digit number ending in 8
Show Notes
14. Multiply any two digit number with 11
Show Notes
16. Squaring a 2 digit number ending in 5
Show Notes
17. Squaring a 2 digit number ending in 4
Show Notes
20. Likewise you can find out square of a number that is one less than the number whose square is known
Show Notes
22. Multiply any two numbers from 11 to 20 in your head Take 15 x 13
Show Notes
23. Multiplying two 2 digit numbers difference of 8
Show Notes
24. Multiplying two 2 digit numbers difference of 3
Show Notes
25. Multiplying two selected 3 digit numbers middle digit 1
Show Notes
26. This little math trick will show you whether a number is divisible by four or not
Show Notes
27. Digital Sums For Multiplication By Eleven
Show Notes
28. Lets add 1 hr and 35 minutes and 3 hr 55 minutes together
Show Notes
29. find square of a number between 50 and 60
Show Notes
30. The Squaring of Numbers Ending in 5
Show Notes
33. Multiplying two selected 3 digit numbers middle digit 0
Show Notes
35. Multiplying two 2 digit numbers difference of 10
Show Notes
38. Squaring a 2 digit number beginning with 9
Show Notes
39. Vertically and Crosswise To find 26 Multiplied by 31 in One Line we need to look at a Pattern
Show Notes
42. Multiplying two 2 digit numbers difference of 1
Show Notes
43. Squaring a 2 digit number ending in 1
Show Notes
45. Convert Fahrenheit to Celsius and vice versa
Show Notes
46. Simple trick to remember table of 19
Show Notes
47. Multiplying two 2 digit numbers difference of 2
Show Notes
48. Squaring a 2 digit number ending in 7
Show Notes
49. How to multiply 123 and 321 in one go
Show Notes
