In Chapter 4. Multiplication Table For 5 And 7, Key Numbers For Week Days I have already explained how to create multiplication table for 5 on time. But in this post I will explain it again in the easier form so that you can create the table for 5 more quickly.
STEP 1. Create a table as shown below
Here, first column contains multiplication i.e. 5 x a number (010). In second column we have only 5 as the last digit in alternate rows whereas in 3rd column we have only 0 as the last digit in alternate rows.
STEP 2. Put numbers in order 0, 0, 1, 1, 2, 2 and so on in alternate rows and before existing digit. So, we get
And multiplication table for 5 is ready! :)
Now let's move to our important multiplication table i.e. for 7. It is so easy and interesting, you will surely enjoy while creating it.
STEP 1. Create a table as shown below
STEP 1. Create a table as shown below
5 x 0

0


5 x 1

5


5 x 2

0


5 x 3

5


5 x 4

0


5 x 5

5


5 x 6

0


5 x 7

5


5 x 8

0


5 x 9

5


5 x 10

0

Here, first column contains multiplication i.e. 5 x a number (010). In second column we have only 5 as the last digit in alternate rows whereas in 3rd column we have only 0 as the last digit in alternate rows.
STEP 2. Put numbers in order 0, 0, 1, 1, 2, 2 and so on in alternate rows and before existing digit. So, we get
5 x 0

00
 
5 x 1

05
 
5 x 2

10
 
5 x 3

15
 
5 x 4

20
 
5 x 5

25
 
5 x 6

30
 
5 x 7

35
 
5 x 8

40
 
5 x 9

45
 
5 x 10

50

And multiplication table for 5 is ready! :)
Now let's move to our important multiplication table i.e. for 7. It is so easy and interesting, you will surely enjoy while creating it.
STEP 1. Create a table as shown below
7

4

1

8

5

2

9

6

3

Here we have entered the numbers from 1 to 9 in top to bottom and right to left order. Let's say these are last digits of our multiplication results.
STEP 2. Create another table as shown below
0

1

2

2

3

4

4

5

6

Let's say these are first digits of our multiplication results.
STEP 3. Merge two tables and we get
07

14

21

28

35

42

49

56

63

In another way
7x1=07

7x2=14

7x3=21

7x4=28

7x5=35

7x6=42

7x7=49

7x8=56

7x9=63

Also we know, 7 x 0 =00 and 7 x 10 =70. This is the multiplication table from 7 x 0 till 7 x 10. Now we will see for 7 x 11 till 7 x 20.
First table will remain the same i.e.
7

4

1

8

5

2

9

6

3

Second table will be changed. We had left second table at 6 in STEP 2. So this time we will start from 7.
7

8

9

9

10

11

11

12

13

Merging two tables will give
7x11=77

7x12=84

7x13=91

7x14=98

7x15=105

7x16=112

7x17=119

7x18=126

7x19=133

An 7 x 20 =140. That is to it! Now you can surely create multiplication table for 7 on time.. :)
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