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
nonzero part, we put as many zeroes in the product as in the multiplier and
then multiply the number by nonzero 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:
(iv)
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
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