Now let’s have a look
on the table of fifteen.
Here is the table of
fifteen as given in textbooks etc.
15 x 01 = 015
15 x 02 = 030
15 x 03 = 045
15 x 04 = 060
15 x 05 = 075
15 x 06 = 090
15 x 07 = 105
15 x 08 = 120
15 x 09 = 135
15 x 10 = 150
Simply Padding Zero at
the End of the number then sum up the same number five times with answer to get
the table of fifteen.
15 x 01 = 015 = (01
x 10) + (01 x 5) = 010 + 05
15 x 02 = 030 = (02
x 10) + (02 x 5) = 020 + 10
15 x 03 = 045 = (03
x 10) + (03 x 5) = 030 + 15
15 x 04 = 060 = (04
x 10) + (04 x 5) = 040 + 20
15 x 05 = 075 = (05
x 10) + (05 x 5) = 050 + 25
15 x 06 = 090 = (06
x 10) + (06 x 5) = 060 + 30
15 x 07 = 105 = (07
x 10) + (07 x 5) = 070 + 35
15 x 08 = 120 = (08
x 10) + (08 x 5) = 080 + 40
15 x 09 = 135 = (09
x 10) + (09 x 5) = 090 + 45
15 x 10 = 150 = (10
x 10) + (10 x 5) = 100 + 50
Tip
2: Direct Calculation with help of series of 5s and 0s
Note the last digits;
they are just series of 5s and 0s
15 x 01 = 01 5
15 x 02 = 03 0
15 x 03 = 04 5
15 x 04 = 06 0
15 x 05 = 07 5
15 x 06 = 09 0
15 x 07 = 10 5
15 x 08 = 12 0
15 x 09 = 13 5
15 x 10 = 15 0
Right most digits are
just series of 1 to 15 except 2, 5, 8,
11, 14...
15 x 01 = 01 5
15 x 02 = 03
0
15 x 03 = 04 5
15 x 04 = 06
0
15 x 05 = 07 5
15 x 06 = 09
0
15 x 07 = 10 5
15 x 08 = 12
0
15 x 09 = 13 5
15 x 10 = 15
0
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