How to multiply with easy and quick will be explained.
If you follow me, then you can solve all the problems below.
Just remember base, which means a power of 10, and a series of process.
Let's solve the example, 98 X 97
- The base shall be 100.
- You shall subtract 100 each from 98 and 97, which would be -2, -3.
- You shall position numbers like the followed.
- On the left, you shall position the value of 98 + (-3) or 97 + (-2) which is the diagonal summation.
- On the right, you shall position the value of (-2) X (-3).
The digits on the right must be equal to the number of zeros in base.
98 -2
97 -3
-------------
95 | 06
Do Exercise
- 9996 X 9997 = ?
Base : 10,000
9996 -4
9997 -3
--------------------
9993 | 0012
- 699 X 998
Base : 1,000
699 -301
998 -2
------------------
697 | 602
- 1002 X 1004
Base : 1,000
1002 +2
1004 +4
--------------------
1006 | 008
- 1301 X 1004
Base : 1,000
1301 +301
1004 +4
--------------------
1305 | 1204 → wrong
1305 |
1 | 204
--------------------
1306 | 204
- 1007 X 998
Base : 1,000
1007 +7
998 -2
--------------------
1005 | (-14)
--------------------
1004 | 986 ← 1000-14
