Ch 12 Exponents and Powers || Full Exercise 12.2 & Basic || Class 8 Maths || RBSE CBSE NCERT

EXERCISE 12.2
1. Express the following numbers in standard form.
(i) 0.0000000000085 (ii) 0.00000000000942
(iii) 6020000000000000 (iv) 0.00000000837
(v) 31860000000
2. Express the following numbers in usual form.
(i) 3.02 × 10^– 6 (ii) 4.5 × 10^4
(iii) 3 × 10^– 8
(iv) 1.0001 × 10^9
(v) 5.8 × 10^12 (vi) 3.61492 × 10^6
3. Express the number appearing in the following statements in standard form.
(i) 1 micron is equal to 1/1000000 m.
(ii) Charge of an electron is 0.000,000,000,000,000,000,16 coulomb.
(iii) Size of a bacteria is 0.0000005 m
(iv) Size of a plant cell is 0.00001275 m
(v) Thickness of a thick paper is 0.07 mm
4. In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of
thickness 0.016 mm. What is the total thickness of the stack.
एक्सक्लूसिव 12.2
1. निम्नलिखित संख्याओं को मानक रूप में व्यक्त करें।
(i) 0.0000000000085 (ii) 0.00000000000942
(iii) 6020000000000000 (iv) 0.00000000837
(v) 31860000000
2. सामान्य रूप में निम्नलिखित संख्याओं को व्यक्त करें।
(i) 3.02 × 10–6 (ii) 4.5 × 104
(iii) 3 × 10– 8
(iv) 1.0001 × 109
(v) 5.8 × 1012 (vi) 3.61492 × 106
3. मानक रूप में निम्नलिखित कथनों में प्रदर्शित होने वाली संख्या को व्यक्त करें।
(i) 1 माइक्रोन 1/1000000 मीटर के बराबर है।
(ii) एक इलेक्ट्रॉन का चार्ज 0.000,000,000,000,000,000,16 युग्मन है।
(iii) बैक्टीरिया का आकार 0.0000005 मीटर है
(iv) पादप कोशिका का आकार 0.00001275 मीटर है
(v) मोटे कागज की मोटाई 0.07 मिमी है
4. स्टैक में 5 किताबें हैं जिनमें से प्रत्येक की मोटाई 20 मिमी और प्रत्येक की 5 पेपर शीट हैं
मोटाई 0.016 मिमी। स्टैक की कुल मोटाई क्या है।

[bhatfarhan]

Thank you
Exam kids sarii tension khtm huviii...
Once again thank you 🤗

[vishakhanamdev]

thank you thank you thank you sir aapko jitna bolu utna kam hai aapko pata nahi ki aapne meri kitni badi help ki hai thank you so much sir

[craftygirl-heyr]

Very, very, very easy and best explanation sir thank you so much i was in full of doubts, but you cleared my all doubts thank u sir🙏☺️

[ramnareshpandey]

Sir your teaching style are nice 👍👍 thanks a lot

[purushottamkumawat]

Thank you sir, aaj mera half yearly me maths ka paper hai.ab mere saare doubts khatam ho gaye

[mangilalnagar]

Thank you sir thank you sir thank you sir thank you so much sir thank you so much sir ❤❤❤❤❤❤ jitna bhi bol utna kam hai

[tabujaan]

Sir, really you are hero aaf kai samjana kai baad no doubt thanku sir

[sumitmadan]

Sir before i couldn't understand maths clearly but with your explanation i like math so much now and understand really clearly !!! You helped me a lot sir thanks best sir of maths ever

[chanchladevi]

THANKS SIR FOR TEACHING MATH THANKS❤❤

[adityachandorkar]

Nice trick sir it's useful for competitive exams ...as well

[The_sassy_baby]

Thank you so much sir ☺️itne ache tarike se explain krne k liye...❤ it helps me alot...!!!😄🥰

[yugankshukla]

Thank you sir you are best teacher ever

[ishratsultana-ojem]

Sahi mein sir ap to kamal ho mai jab se ap ke videos dekhi tab se mere bachchon ko sirf ap ke hi videos dekhu bolti

[FF_BOYZ]

I don't know Hindi I am from KARNATAKA but your teaching can understand very well
Thank you soo much sir🥰

[FaizKhan-frzp]

You explain very well I understand your explanation thank you sir for this .

[ly_gamingff]

Sir aap kitne achhe se samjha rhe ho. You are so brilliant

[adeeeeeena]

Tysm sir ❤...i really luved d way of ua teaching

[tumtopagalho]

Thanks 😊 you bhaiyaa ❤️❤️❤️❤️❤️❤️✨❤️❤️✨✨❤️❤️❤️❤️❤️

[PoojaSharma-kncg]

U are the best teacher in the world thank you sir

[terronSquad]

Finally I find best teacher and master of maths
Thanku so much bhaiya we want these types of teachers on YouTube ▶️.
Once again thanku