Internal Concept of Times Table of Twenty

Now let’s have a look on the table of twenty.

Here is the table of twenty as given in textbooks etc.

          20 x 01 = 020

          20 x 02 = 040

          20 x 03 = 060

          20 x 04 = 080

          20 x 05 = 100

          20 x 06 = 120

          20 x 07 = 140

          20 x 08 = 160

          20 x 09 = 180

          20 x 10 = 200

Tip 1: Simply sum up the number twice then pad the zero at the end of answer.

20 x 01 = 020 = (01 x 2) x 10 = (01 + 01) x 10 = 02 x 10

20 x 02 = 040 = (02 x 2) x 10 = (02 + 02) x 10 = 04 x 10

20 x 03 = 060 = (03 x 2) x 10 = (03 + 03) x 10 = 06 x 10

20 x 04 = 080 = (04 x 2) x 10 = (04 + 04) x 10 = 08 x 10

20 x 05 = 100 = (05 x 2) x 10 = (05 + 05) x 10 = 10 x 10

20 x 06 = 120 = (06 x 2) x 10 = (06 + 06) x 10 = 12 x 10

20 x 07 = 140 = (07 x 2) x 10 = (07 + 07) x 10 = 14 x 10

20 x 08 = 160 = (08 x 2) x 10 = (08 + 08) x 10 = 16 x 10

20 x 09 = 180 = (09 x 2) x 10 = (09 + 09) x 10 = 18 x 10

20 x 10 = 200 = (10 x 2) x 10 = (10 + 10) x 10 = 20 x 10

Tip 2: Justify the answers with help of sums of digits.

          20 x 01 = 020 = 0 + 2 + 0 = 2

          20 x 02 = 040 = 0 + 4 + 0 = 4

          20 x 03 = 060 = 0 + 6 + 0 = 6

          20 x 04 = 080 = 0 + 8 + 0 = 8

          20 x 05 = 100 = 1 + 0 + 0 = 1

          20 x 06 = 120 = 1 + 2 + 0 = 3

          20 x 07 = 140 = 1 + 4 + 0 = 5

          20 x 08 = 160 = 1 + 6 + 0 = 7

          20 x 09 = 180 = 1 + 8 + 0 = 9

          20 x 10 = 200 = 2 + 0 + 0 = 2

Internal Concept of Times Table of Nineteen

Now let’s have a look on the table of nineteen.

Here is the table of nineteen as given in textbooks etc.

          19 x 01 = 019

          19 x 02 = 038

          19 x 03 = 057

          19 x 04 = 076

          19 x 05 = 095

          19 x 06 = 114

          19 x 07 = 133

          19 x 08 = 152

          19 x 09 = 171

          19 x 10 = 190

Tip 1: Simply sum up the number twice then subtract the number from zero padded answer.

19 x 01 = 019 = ((01 x 2) x 10) - 01 = (02 x 10) - 01 = 020 - 01

19 x 02 = 038 = ((02 x 2) x 10) - 02 = (04 x 10) - 02 = 040 - 02

19 x 03 = 057 = ((03 x 2) x 10) - 03 = (06 x 10) - 03 = 060 - 03

19 x 04 = 076 = ((04 x 2) x 10) - 04 = (08 x 10) - 04 = 080 - 04

19 x 05 = 095 = ((05 x 2) x 10) - 05 = (10 x 10) - 05 = 100 - 05

19 x 06 = 114 = ((06 x 2) x 10) - 06 = (12 x 10) - 06 = 120 - 06

19 x 07 = 133 = ((07 x 2) x 10) - 07 = (14 x 10) - 07 = 140 - 07

19 x 08 = 152 = ((08 x 2) x 10) - 08 = (16 x 10) - 08 = 160 - 08

19 x 09 = 171 = ((09 x 2) x 10) - 09 = (18 x 10) - 09 = 180 - 09

19 x 10 = 190 = ((10 x 2) x 10) - 10 = (20 x 10) - 10 = 200 - 10

Tip 2: Justify the answers with help of sums of digits.

          19 x 01 = 019 = 0 + 1 + 9 = 10 = 1 + 0 = 1

          19 x 02 = 038 = 0 + 3 + 8 = 11 = 1 + 1 = 2

          19 x 03 = 057 = 0 + 5 + 7 = 12 = 1 + 2 = 3

          19 x 04 = 076 = 0 + 7 + 6 = 13 = 1 + 3 = 4

          19 x 05 = 095 = 0 + 9 + 5 = 14 = 1 + 4 = 5

          19 x 06 = 114 = 1 + 1 + 4 = 6

          19 x 07 = 133 = 1 + 3 + 3 = 7

          19 x 08 = 152 = 1 + 5 + 2 = 8

          19 x 09 = 171 = 1 + 7 + 1 = 9

          19 x 10 = 190 = 1 + 9 + 0 = 10 = 1 + 0 = 1

Internal Concept of Times Table of Eighteen

Now let’s have a look on the table of eighteen.

Here is the table of eighteen as given in textbooks etc.

          18 x 01 = 018

          18 x 02 = 036

          18 x 03 = 054

          18 x 04 = 072

          18 x 05 = 090

          18 x 06 = 108

          18 x 07 = 126

          18 x 08 = 144

          18 x 09 = 162

          18 x 10 = 180

Tip 1: Simply sum up the number twice then subtract the answer from zero padded answer.

18 x 01 = 018 = ((01 x 2) x 10) - (01 x 2) = (02 x 10) - 02 = 020 - 02

18 x 02 = 036 = ((02 x 2) x 10) - (02 x 2) = (04 x 10) - 04 = 040 - 04

18 x 03 = 054 = ((03 x 2) x 10) - (03 x 2) = (06 x 10) - 06 = 060 - 06

18 x 04 = 072 = ((04 x 2) x 10) - (04 x 2) = (08 x 10) - 08 = 080 - 08

18 x 05 = 090 = ((05 x 2) x 10) - (05 x 2) = (10 x 10) - 10 = 100 - 10

18 x 06 = 108 = ((06 x 2) x 10) - (06 x 2) = (12 x 10) - 12 = 120 - 12

18 x 07 = 126 = ((07 x 2) x 10) - (07 x 2) = (14 x 10) - 14 = 140 - 14

18 x 08 = 144 = ((08 x 2) x 10) - (08 x 2) = (16 x 10) - 16 = 160 - 16

18 x 09 = 162 = ((09 x 2) x 10) - (09 x 2) = (18 x 10) - 18 = 180 - 18

18 x 10 = 180 = ((10 x 2) x 10) - (10 x 2) = (20 x 10) - 20 = 200 - 20

Tip 2: Justify the answers with help of sums of digits.

          18 x 01 = 018 = 0 + 1 + 8 = 9

          18 x 02 = 036 = 0 + 3 + 6 = 9

          18 x 03 = 054 = 0 + 5 + 4 = 9

          18 x 04 = 072 = 0 + 7 + 2 = 9

          18 x 05 = 090 = 0 + 9 + 0 = 9

          18 x 06 = 108 = 1 + 0 + 8 = 9

          18 x 07 = 126 = 1 + 2 + 6 = 9

          18 x 08 = 144 = 1 + 4 + 4 = 9

          18 x 09 = 162 = 1 + 6 + 2 = 9

          18 x 10 = 180 = 1 + 8 + 0 = 9

Internal Concept of Times Table of Seventeen

Now let’s have a look on the table of seventeen.

Here is the table of seventeen as given in textbooks etc.

          17 x 01 = 017

          17 x 02 = 034

          17 x 03 = 051

          17 x 04 = 068

          17 x 05 = 085

          17 x 06 = 102

          17 x 07 = 119

          17 x 08 = 136

          17 x 09 = 153

          17 x 10 = 170

Tip 1: Simply Padding Zero at the End of the number then sum up the same number twice with answer and answer of multiplying number five times to get the table of seventeen.

17 x 01 = 017 = (01 x 10) + (01 x 5) + (01 x 2) = 010 + 05 + 02

17 x 02 = 034 = (02 x 10) + (02 x 5) + (02 x 2) = 020 + 10 + 04

17 x 03 = 051 = (03 x 10) + (03 x 5) + (03 x 2) = 030 + 15 + 06

17 x 04 = 068 = (04 x 10) + (04 x 5) + (04 x 2) = 040 + 20 + 08

17 x 05 = 085 = (05 x 10) + (05 x 5) + (05 x 2) = 050 + 25 + 10

17 x 06 = 102 = (06 x 10) + (06 x 5) + (06 x 2) = 060 + 30 + 12

17 x 07 = 119 = (07 x 10) + (07 x 5) + (07 x 2) = 070 + 35 + 14

17 x 08 = 136 = (08 x 10) + (08 x 5) + (08 x 2) = 080 + 40 + 16

17 x 09 = 153 = (09 x 10) + (09 x 5) + (09 x 2) = 090 + 45 + 18

17 x 10 = 170 = (10 x 10) + (10 x 5) + (10 x 2) = 100 + 50 + 20

Tip 2: Simply Padding Zero at the End of the number and multiply it with two then subtracts the same number three times with answer and get the table of seventeen.

          17 x 01 = 017 = (01 x 10) x 2 - (01 x 3) = (010 x 2) - 03

          17 x 02 = 034 = (02 x 10) x 2 - (02 x 3) = (020 x 2) - 06

          17 x 03 = 051 = (03 x 10) x 2 - (03 x 3) = (030 x 2) - 09

          17 x 04 = 068 = (04 x 10) x 2 - (04 x 3) = (040 x 2) - 12

          17 x 05 = 085 = (05 x 10) x 2 - (05 x 3) = (050 x 2) - 15

          17 x 06 = 102 = (06 x 10) x 2 - (06 x 3) = (060 x 2) - 18

          17 x 07 = 119 = (07 x 10) x 2 - (07 x 3) = (070 x 2) - 21

          17 x 08 = 136 = (08 x 10) x 2 - (08 x 3) = (080 x 2) - 24

          17 x 09 = 153 = (09 x 10) x 2 - (09 x 3) = (090 x 2) - 27

          17 x 10 = 170 = (10 x 10) x 2 - (10 x 3) = (100 x 2) - 30

Tip 3: Justify the answers with help of sums of digits.

          17 x 01 = 017 = 0 + 1 + 7 = 8

          17 x 02 = 034 = 0 + 3 + 4 = 7

          17 x 03 = 051 = 0 + 5 + 1 = 6

          17 x 04 = 068 = 0 + 6 + 8 = 14 = 1 + 4 = 5

          17 x 05 = 085 = 0 + 8 + 5 = 13 = 1 + 3 = 4

          17 x 06 = 102 = 1 + 0 + 2 = 3

          17 x 07 = 119 = 1 + 1 + 9 = 11 = 1 + 1 = 2

          17 x 08 = 136 = 1 + 3 + 6 = 10 = 1 + 1 = 1

          17 x 09 = 153 = 1 + 5 + 3 = 9

          17 x 10 = 170 = 1 + 7 + 0 = 8