Q.1. Write each of the following as decimals :
(i) Three tens and 8 tenths ____________
(ii) Three hundred four and five hundredths ____________
(iii) Thirty and one tenth ____________
(iv) Sixty point two seven six ____________
Ans.
(i) 30.8
(ii) 304.05
(iii) 30.1
(iv) 60.276
Q.2. Convert the following decimals into lowest form of fractions :
(i) 0.8 ____________
(ii) 4.5 ____________
(iii) 8.8 ____________
(iv) 7.0 ____________
Ans.
(i)
(ii)
(iii)
(iv)
Q.3. Express 0.5 and 2.1 on number line.
Ans.
Q.4. Write down the following as decimals :
(i)____________
(ii)____________
(iii)____________
Ans.
(i) 5.01
(ii) 45.12
(iii) 7.01
Q.5. Which is greater?
(i) 5.31 or 5.28 ____________
(ii) 6.321 or 6.312 ____________
Ans.
(i) 5.31
(ii) 6.321
Q.6. Express as rupees using decimals :
(i) 60 paise ____________
(ii) 825 paise ____________
Ans.
(i) 0.6
(ii) 8.25
Q.7. Expres as km using decimals :
(i) 7 mm ____________
(ii) 32 km 51m ____________
Ans.
(i) 0.000007 km
(ii) 32.051 km
Q.8. Add : 15.07 + 10.252 + 6.8
Ans. 32.122
Q.9. Subtract : 18.728 – 9.97
Ans. 8.758
Q.10. Raghu got 500 and he spent 118 on stationary items and 50.75 on eatables. Find the money left with Raghu.
Ans. 331.25
Q.11. Fill in the box with correct option (<, > or =)
(i) 0.7 0.78
(ii) 1 0.96
(iii) 1.8 1.80
(iv) 5.66 5.604
(v) 3.52 4.42
Ans.
(i) <
(ii) >
(iii) =
(iv) >
(v) <
Q.12. Which whole number is nearer to the following?
(i) 4.6 _________
(ii) 0.99 _________
Ans.
(i) 5
(ii) 1
Q.13. Rina bought 4 kg 500 g of rice, 3 kg 400 g of dal and 1 kg 250 g of sugar. Find the total weight of all the items she bought.
Ans. 9 kg 150 g
Q.14.
(i) Write 1.284 in words.
(ii) Convert in to decimals :
____________ (b) _________ (c) _________
Ans.
(i) One point two eight four.
(ii) (a) 3.6
(b) 1.75
(c) 4.5
Q.15. Write the following decimals in the place value chart :
(i) 158.42
(ii) 101.056
(iii) 0.496
Ans.
94 videos347 docs54 tests

1. What are decimals and how are they used in mathematics? 
2. How do you compare decimals? 
3. How do you add and subtract decimals? 
4. How do you multiply decimals? 
5. How do you divide decimals? 

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