Mathematics
The cost of 1 metre of cloth is ₹35.80. What will be cost of 9.8 metres of cloth?
Decimals
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Answer
Cost of 1 metre of cloth = ₹35.80
Cost of 9.8 metres of cloth = ₹35.80 × 9.8
Ignoring the decimal points, 3580 × 98 = 350840.
The two factors together have 2 + 1 = 3 decimal places, so:
35.80 × 9.8 = 350.840 = 350.84
Hence, the cost of 9.8 metres of cloth is ₹350.84.
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Fill in the following blanks:
(i) The decimal point in a decimal number is placed between ones digit and …. digit.
(ii) The place value of the digit 3 in the decimal number 15.437 is …..
(iii) The decimal number 27.025 has ….. decimal places.
(iv) The decimal number 5.06 is read as five point …..
(v) If an object is divided into 1000 equal parts, then its 27 parts are represented by …..
(vi) Two decimal numbers having different number of ….. are called unlike decimal numbers.
(vii) 4 tens, 3 ones, 2 tenths, 0 hundredths and 5 thousandths in decimal form is written as …..
(viii) The smallest decimal number upto three decimal places is ……
(ix) The largest four digit decimal number less than 1 using the digits 1, 5, 3 and 8 once is …