MULTIPLYING WHOLE NUMBERS BY 10 100 AND 1000

A) Work out these multiplications.

Problem 1 :

7 × 10

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

7 × 10

= 7 × 1

Multiplying the numerals alone without 0.

= 7

Writing 0 after the numeral.

= 70

Problem 2 :

2 × 10

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

2 × 10

= 2 × 1

= 2

= 20

Problem 3 :

 10 × 8

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

10 × 8

= 1 × 8

= 8

= 80

Problem 4 :

 12 × 10

Solution :

12 × 10

= 12 × 1

= 12

= 120

Problem 5 :

 10 × 15

Solution :

10 × 15

= 1 × 15

= 15

= 150

Problem 6 :

 18 × 10

Solution :

18 × 10

= 18 × 1

= 18

= 180

Problem 7 :

 10 × 16

Solution :

10 × 16

= 1 × 16

= 16

= 160

Problem 8 :

 22 × 10

Solution :

22 × 10

= 22 × 1

= 22

= 220

Problem 9 :

 10 × 21

Solution :

10 × 21

= 1 × 21

= 21

= 210

Problem 10 :

 32 × 10

Solution :

32 × 10

= 32 × 1

= 32

= 320

Problem 11 :

 10 × 30

Solution :

10 × 30

= 1 × 3

= 3

= 300

Problem 12 :

 28 × 10

Solution :

28 × 10

= 28 × 1

= 28

= 280

Problem 13 :

 10 × 43

Solution :

10 × 43

= 1 × 43

= 43

= 430

Problem 14 :

 54 × 10

Solution :

54 × 10

= 54 × 1

= 54

= 540

Problem 15 :

 10 × 37

Solution :

10 × 37

= 1 × 37

= 37

= 370

Problem 16 :

 80 × 10

Solution :

80 × 10

= 8 × 1

= 8

= 800

Problem 17 :

 10 × 47

Solution :

10 × 47

= 1 × 47

= 47

= 470

Problem 18 :

 59 × 10

Solution :

59 × 10

= 59 × 1

= 59

= 590

Problem 19 :

 10 × 78

Solution :

10 × 78

= 1 × 78

= 78

= 780

Problem 20 :

 65 × 10

Solution :

65 × 10

= 65 × 1

= 65

= 650

Problem 21 :

 10 × 84

Solution :

10 × 84

= 1 × 84

= 84

= 840

Problem 22 :

 96 × 10

Solution :

96 × 10

= 96 × 1

= 96

= 960

Problem 23 :

 10 × 59

Solution :

10 × 59

= 1 × 59

= 59

= 590

Problem 24 :

 48 × 10

Solution :

48 × 10

= 48 × 1

= 48

= 480

A) Work out these multiplications.

Problem 1 :

16 × 10

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

16 × 10

= 16 × 1

= 16

= 160

Problem 2 :

25 × 10

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

25 × 10

= 25 × 1

= 25

= 250

Problem 3 :

 10 × 17

Solution :

When we multiply integer by 10, 100, 1000, ...... etc, 

It is enough to multiply the integers by 1, leave the number of zeroes we have in 10, 100, 1000, .......

When we write the answer, write the number of zeroes that we are leaving at the end.

10 × 17

= 1 × 17

= 17

= 170

Problem 4 :

 9 × 10

Solution :

9 × 10

= 9 × 1

= 9

= 90

Problem 5 :

 10 × 31

Solution :

10 × 31

= 1 × 31

= 31

= 310

Problem 6 :

 43 × 10

Solution :

43 × 10

= 43 × 1

=  43

= 430

Problem 7 :

 10 × 14

Solution :

10 × 14

= 1 × 14

= 14

= 140

Problem 8 :

 56 × 10

Solution :

56 × 10

= 56 × 1

=  56

= 560

Problem 9 :

 10 × 38

Solution :

10 × 38

= 1 × 38

= 38

= 380

Problem 10 :

 53 × 10

Solution :

53 × 10

= 53 × 1

=  53

= 530

Problem 11 :

 10 × 76

Solution :

10 × 76

= 1 × 76

= 76

= 760

Problem 12 :

 88 × 10

Solution :

88 × 10

= 88 × 1

=  88

= 880

Problem 13 :

 10 × 37

Solution :

10 × 37

= 1 × 37

= 37

= 370

Problem 14 :

 80 × 10

Solution :

80 × 10

= 8 × 1

=  8

= 800

Problem 15 :

 10 × 64

Solution :

10 × 64

= 1 × 64

= 64

= 640

Problem 16 :

 95 × 10

Solution :

95 × 10

= 95 × 1

=  95

= 950

Problem 17 :

 10 × 68

Solution :

10 × 68

= 1 × 68

= 68

= 680

Problem 18 :

 39 × 10

Solution :

39 × 10

= 39 × 1

=  39

= 390

Problem 19 :

 10 × 74

Solution :

10 × 74

= 1 × 74

= 74

= 740

Problem 20 :

 48 × 10

Solution :

48 × 10

= 48 × 1

=  48

= 480

Problem 21 :

 10 × 92

Solution :

10 × 92

= 1 × 92

= 92

= 920

Problem 22 :

 50 × 10

Solution :

50 × 10

= 5 × 1

=  5

= 500

Problem 23 :

 10 × 75

Solution :

10 × 75

= 1 × 75

= 75

= 750

Problem 24 :

 99 × 10

Solution :

99 × 10

= 99 × 1

=  99

= 990