# NCERT Exemplar Solutions Class 8 Mathematics Solutions for Exponents and Powers - Exercise in Chapter 8 - Exponents and Powers

Question 26 Exponents and Powers - Exercise

\text { The usual form for } 2.03 \times 10^{-5}

(a) 0.203 (b) 0.00203 (c) 203000 (d) 0.0000203

(d) 0.0000203

Video transcript
"hello students my name is pramit singh and i welcome you all to lido learning homework one of india's best online classes now today in this video we have a question that is based on the topic standard form the question says the usual form for 2.03 into 10 to the power minus 5 we have four options out of these four options we have to mark the correct one so first option will cannot be the answer because it is smaller value but not that smaller this cannot be the answer this is a very large value now if you check option d it is exactly the given form of the standard equation standard form so i hope you have understood how we will convert this standard form in this form you can check here we have 10 to the power minus 5 and count the digits 1 2 three four four zeros and fifth digits so this is the concept the relation between this and the negative exponent how we are expressing negative with negative numbers or very smaller numbers with the help of standard form these are negative exponents so for this question answer is option d that is zero point zero zero zero zero two zero three so i hope you have understood the concept very clearly but still if you have any doubt do comment in the comment box and please like and subscribe our channel for lido thank you "
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