Multiplication by Ten, Hundred and Thousand

To multiply a number by 10, 100, or 1000 we need to count the
number of zeroes in the multiplier and write the same number of zeroes to the
right of the multiplicand.

 

Rules for the multiplication by 10, 100 and 1000:

● If we multiply a whole number by a 10, then we write
one zero at the end of the multiplicand.

For example:

1275 × 10 = 12750

● If we multiply a whole number by a 100, then we write
two zeros at the end of the multiplicand.

For example:

1275 × 100 = 127500

 

● If we multiply a whole number by a 1000, then we write
three zeros at the end of the multiplicand.

For example:

1275 × 1000 = 1275000

 

●  To multiply a number by a multiplier having zero and
non-zero part, we put as many zeroes in the product as in the multiplier and
then multiply the number by non-zero part.

For example:

1275 × 20 = 25500

1275 × 300 = 382500

1275 × 5000 = 6375000

You can even keep the above chart for further reference.

 

Questions and Answers on Multiplication by Ten, Hundred and Thousand

1. Compare the given wheels by writing the product in the outermost circle.

(i)

 

Answers:

 

(ii)

 

Answers:

 

(iii)

 

Answers:

 

2. Find the missing multiplicand in each of the following
questions.

(i) ……………… × 40 = 36000

(ii) ……………… × 500 = 7500000

(iii) ……………… × 700 = 77000000

(iv) ……………… × 9000 = 81000

(v) ……………… × 80000 = 96000000

 

Answers:

(i) 900

(ii) 15000

(iii) 110000

(iv) 9

(v) 1200

 

3. Fill in the blanks.

(i) 17 × 10 = __________

(ii) 68 × __________ = 68000

(iii) 25 × 100 = __________

(iv) 100 × __________ = 22500

(v) 23 × 1000 = __________

(vi) __________ × 10 = 8900

(vii) 24 × 10 = __________

(viii) __________ × 1000 = 40000

(ix) 31 × 100 = __________

(x) __________ × 1000 = 48000

(xi) 78 × 1000 = __________

(xii) __________ × 18 = 18000

(xiii) 16 × __________ = 1600

(xiv) 100 × __________ = 68200

(xv) __________ × 42 = 420

(xvi) __________ × 115 = 11500

(xvii) 723 × __________ = 7230

(xviii) __________ × 1000 = 27000

(xix) __________ × 807 = 8070

(xx) __________ × 100 = 50900

(xxi) 1000 × __________ = 63000

(xxii) 999 × 100 = __________

 

Answer:

(i) 170

(ii) 1000

(iii) 2500

(iv) 225

(v) 23000

(vi) 890

(vii) 240

(viii) 40

(ix) 3100

(x) 48

(xi) 78000

(xii) 1000

(xiii) 100

(xiv) 682

(xv) 10

(xvi) 100

(xvii) 10

(xviii) 27

(xix) 10

(xx) 509

(xxi) 63

(xxii) 99900