# Decimals – Class 6 Maths/ Exercise 8.4/ NCERT Solutions

Chapter 8 of CBSE/NCERT Class 6 Mathematics is about Decimals. In this lesson you can find out text book solutions of Decimals Exercise 8.4.

CBSE CLASS 6 MATHEMATICS
Decimals – Chapter 8/ Exercise 8.4 / NCERT Solutions.

1. Express as rupees using decimals.
a) 5 paise
b) 75 paise
c) 20 paise
d) 50 rupees 90 paise
e) 725 paise
We know that 100 paise = 1 rupee
Therefore, 1 paise = 1/100 rupee = 0.01 rupee.
a) 5 paise = 0.05 rupee
b) 75 paise = 0.75 rupee
c) 20 paise = 0.20 rupee
d) 50 rupees 90 paise = 50 + 90 paise = 50 + 0.90 = 50.90 rupees
e) 725 paise = 7.25 rupees
2. Express as metres using decimals.
a) 15 cm
b) 6 cm
c) 2 m 45 cm
d) 9 m 7 cm
e) 419 cm
We know that 100 cm = 1 m
Therefore, 1 cm = 1/100 m = 0.01 m
a) 15 cm = 0.15 m
b) 6 cm = 0.06 m
c) 2m 45 cm = 2m + 45 cm = 2 m + 0.45 m = 2.45 m
d) 9 m 7 cm = 9 m +7 cm = 9 m + 0.07 m = 9.07 m
e) 419 cm = 4.19 m
3. Express as cm using decimals.
a) 5 mm
b) 60 mm
c) 164 mm
d) 9 cm 8 mm
e) 93 mm
We know that 10 mm = 1 cm
Therefore, 1 mm = 1/10 cm = 0.1 cm
a) 5 mm = 0.5 cm
b) 60 mm = 6 cm
c) 164 mm = 1.64 cm
d) 9 cm 8 mm = 9cm + 8 mm = 9 cm + 0.8 cm = 9.8 cm
e) 93 mm= 9.3 cm
4. Express as km using decimals.
a) 8 m
b) 88 m
c) 8888 m
d) 70 km 5 m
We know that 1000 m = 1 km
Therefore, 1 m = 1/1000 km = 0.001 km
a) 8 m = 0.008 km
b) 88 m = 0.088 km
c) 8888 m = 8.888 km
d) 70 km 5 m = 70 km + 5 m = 70 km + 0.005 km = 70.005 km
5. Express as kg using decimals
a) 2 g
b) 100 g
c) 3750 g
d) 5 kg 8 g
e) 26 kg 50 g