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Home » NCERT Solutions » Class 6 » Maths » Chapter 8 Decimals » Exercise 8.4

Exercise 8.4

Last Updated on September 20, 2022 By Mrs Shilpi Nagpal

Exercise 8.1
Exercise 8.2
Exercise 8.3
Exercise 8.4
Exercise 8.5
Exercise 8.6

NCERT Answers for Class 6 Maths Chapter 8 Decimals Exercise 8.4

Page 177

Ex 8.4 Class 6 Maths Question 1. Express as rupees using decimals.

(a) 5 paise  (b) 75 paise  (c) 20 paise
(d) 50 rupees 90 paise   (e) 725 paise

Answer

We know that there are 100 paise in 1 rupees

(a) 5 paise = 5 / 100 rupees

= Rupess 0.05

(b) 75 paise = 75 / 100 rupees

= Rupees 0.75

(c) 20 paise = 20 / 100 rupees

= Rupees 0.20

(d) 50 rupees 90 paise = [(50 + 90 / 100)] rupees

= Rupees 50.90

(e) 725 paise = 725 / 100 rupees

= Rupees 7.25

Ex 8.4 Class 6 Maths Question 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

Answer

We know that there are 100 cm in 1 metre

(a) 15 cm = 15 / 100 m

= 0.15 m

(b) 6 cm = 6 / 100 m

= 0.06 m

(c) 2 m 45 cm = [(2 + 45 / 100)] m

= 2.45 m

(d) 9 m 7 cm = [(9 + 7 / 100)] m

= 9.07 m

(e) 419 cm = 419 / 100 m

= 4.19 m

Ex 8.4 Class 6 Maths Question 3. Express as cm using decimals.
(a) 5 mm     (b) 60 mm    (c) 164 mm
(d) 9 cm 8 mm    (e) 93 mm

Answer

We know that there are 10 mm in 1 cm

(a) 5 mm = 5 / 10 cm

= 0.5 cm

(b) 60 mm = 60 / 10 cm

= 6.0 cm

(c) 164 mm = 164 / 10 cm

= 16.4 cm

(d) 9 cm 8 mm = [(9 + 8 / 10)] cm

= 9.8 cm

(e) 93 mm = 93 / 10 cm

= 9.3 cm

Ex 8.4 Class 6 Maths Question 4. Express as km using decimals.
(a) 8 m          (b) 88 m
(c) 8888 m    (d) 70 km 5 m

Answer

We know that there are 1000 metres in 1 km

(a) 8 m = 8 / 1000 km

= 0.008 km

(b) 88 m = 88 / 1000 km

= 0.088 km

(c) 8888 m = 8888 / 1000 km

= 8.888 km

(d) 70 km 5 m = [(70 + 5 / 1000)] km

= 70.005 km

Ex 8.4 Class 6 Maths Question 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

Answer

We know that there are 1000 grams in 1 kg

(a) 2 g = 2 / 1000 kg

= 0.002 kg

(b) 100 g = 100 / 1000 kg

= 0.1 kg

(c) 3750 g = 3750 / 1000 kg

= 3.750 kg

(d) 5 kg 8 g = [(5 + 8 / 1000)] kg

= 5.008 kg

(e) 26 kg 50 g = [(20 + 50 / 1000)] kg

= 26.050 kg

Filed Under: Chapter 8 Decimals, Class 6, Maths, NCERT Solutions

About Mrs Shilpi Nagpal

Author of this website, Mrs. Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed. (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading free education to everyone.

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