MULTIPLICATION BY SERIES OF 9
CASE II
WHEN 9 SERIES ARE MORE THAN NO.
STEP 1. ADD 0 IN FRONT OF THE NO. TO MAKE IT EQUAL
STEP 2. Reduce the no. by 1
STEP 3. Then subtract the result by 9 series
e.g. 1 - 103 X 9999
0103 X 9999
0102
9-0 =9
9-1=8
9-0=9
9-2=7
Finally the answer will be 1029897
e.g. 2 - 7 X 999
007 X 999
006
9-6=3
Finally the answer will be 6993
e.g. 3 - 918 X 99999
00918
00917
9-9 =0
9-7=2
Finally the answer will be 91799082