Sunday, 15 April 2012

CBSE Class 6th ( VI) Mathematics Chapter 8. Decimals: Exercise 8.1 Solved

1. Write the following as numbers in the given table.
   













Answer 
   
















2. Write the following decimals in the place value table.
  1. 19.4
  2. 0.3
  3. 10.6
  4. 205.9
Answer:
DecimalsHundreds (100)Tens (10)Ones (1)Tenths(1/10)
(a) 19.40194
(b) 0.30003
(c) 10.6 0106
(d) 205.92059
3. Write each of the following as decimals :
  1. Seven-tenths
  2. Two tens and nine-tenths
  3. Fourteen point six
  4. One hundred and two ones
  5. Six hundred point eight
Answer:
  1. 0.7
  2. 20.9
  3. 14.6
  4. 102.0
  5. 600.8
4. Write each of the following as decimals:
   













Answer:


   


 5. Write the following decimals as fractions. Reduce the fractions to lowest form.
  1. 0.6
  2. 2.5
  3. 1.0
  4. 3.8
  5. 13.7
  6. 21.2
  7. 6.4
Answer: 
  


























 6. Express the following as cm using decimals.
  1. 2 mm
  2. 30 mm
  3. 116 mm
  4. 4 cm 2 mm
  5. 162 mm
  6. 83 mm
Answer:
mmcm
  1. 2 mm
  2. 30 mm
  3. 116 mm
  4. 4 cm 2 mm
  5. 162 mm
  6. 83 mm
= 0.2cm
= 3.0 cm
= 11.6 cm
= 4.2 cm
= 16.2 cm
= 8.3 cm
7. Between which two whole numbers on the number line are the given numbers lie? Which of these whole numbers is nearer the number?
  1. 0.8
  2. 5.1
  3. 2.6
  4. 6.4
  5. 9.1
  6. 4.9
Answer:
Given NumbersTwo whole numbers between which the given numbers lie on the number linewhole numbers nearer to given number
  1. 0.8
  2. 5.1
  3. 2.6
  4. 6.4
  5. 9.1
  6. 4.9
0 and 1
5 and 6
2 and 3
6 and 7
9 and 10
4 and 5;
1
5
3
6
9
5
8. Show the following numbers on the number line.
  1. 0.8
  2. 5.1
  3. 2.6
  4. 6.4
  5. 9.1
  6. 4.9
Answer: 
  







9. Write the decimal number represented by the points A, B, C, D on the given number line.

  
  




 Answer:
 
Given pointsDecimal number represented by the points
A0.8 cm
B1.3 cm
C2.2 cm
D2.9 cm
10.
  1. The length of Ramesh’s notebook is 9 cm 5 mm. What will be its length in cm?
  2. The length of a young gram plant is 65 mm. Express its length in cm.
Answer:
The length of Ramesh’s
notebook = 9 cm 5 mm
=9×10+5 mm=95mm=95/10cm=9.5cm
The length of a young
gram plant = 65 mm
=65/10 cm=6.5 cm


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