Decimals/CBSE Class 6 Mathematics/Extra Questions for Practice

Answer the following:

1. Write the following as decimals:
   3 hundreds 2 tens 9 ones 4 tenths 7 hundredths
   Solution:
   3 x 100 + 2 x 10 + 9 x 1 + 4 x 1/10 + 7 x 1/100
   = 300 + 20 + 9 + 0.4 + 0.07
   = 329.47
2. Write as decimals: Four tens and nine tenths
   Solution: 4 x 10 + 9 x 1/10 = 40 + 0.9 = 40.9
3. Which is greater 0.9 or 0.09?
   Solution: 0.9 > 0.09
4. Express the following as rupees:
   a) 5 paise
   b) 750 paise
   Solution:
   a) 5 paise = 5/100 rupees = 0.05 rupees
   b) 750 paise = 750/100 rupees = 7.50 rupees
5. Express each of the following in terms of litres using decimals:
   a) 525 ml
   b) 3litre 750 ml
   Solution:
   a) We know that 1 litre = 1000 ml
   525 ml = 525/1000 litre= 0.525 litre
   b) 3 litre + 750/1000 litre = 3 + 0.750 = 3.750 litre
6. Add 4.3 and 2.15
   Solution: 4.3 + 2.15 = 6.45
7. Subtract 0.87 from 1.5
   Solution: 1.5 – 0.87 = 063
8. Compare 0.2 and 0.25
   Solution: 0.25 > 0.2
9. Find the sum of 0.15, 0.8 and 0.02
   Solution: 0.15 + 0.8 + 0.02 = 0.97
10. Write the fraction as decimals: 4/20
    Solution: 4/20 x 5/5 = 20/100 = 0.20
11. Arrange the following numbers in descending order:
    9.08, 9.34, 8.98, 8.89, 9.1
    Solution: 9.34, 9.1, 9.08, 8.98, 8.89
12. Express 324 mm as cm using decimals.
    Solution: We know that 1cm = 10mm
    324mm = 324/10 = 32.4 cm
13. Write the number name of 104.87
    Solution: One hundred four point eight seven
14. Arrange the following decimals in ascending order:
    2.87, 8.72, 7.28, 8.27, 7.82
    Solution: 2.87, 7.28, 7.82, 8.27, 8.72
15. Write the whole number which is nearest to the following decimal numbers:
    a) 0.987
    b) 2.8
    Solution:
    a) 1
    b) 3