# Ncert Solutions For Class 6 Maths Ex 8.4

## Ncert Solutions For Class 6 Maths Chapter 8 Ex 8.4

Q1. Express in the form of rupees using decimal places.

1. 6 paise
2. 85 paise
3. 30 paise
4. 60 rupees 40 paise
5. 625 paise
6. 450 paise

We know that, 100 paise is equal to 1 rupee.

1. 6 paise = $$\frac{6}{100}$$ rupees = Re 0.06
2. 85 paise = $$\frac{85}{100}$$ rupees = Re 0.85
3. 30 paise = $$\frac{30}{100}$$ rupees = Re 0.30
4. 60 rupees 40 paise = $$60 + \frac{40}{100}$$ = Re 60.40
5. 625 paise = ($$\frac{625}{100}$$) rupees = Re 6.25
6. 450 paise = $$\frac{450}{100}$$ rupees = Re 4.50

Q2. Express the following in the form of metres using decimal places.

1. 16 cm
2. 5 cm
3. 3 m 25 cm
4. 5 m 8 cm
5. 625 cm
6. 213 cm

We know that, 100 cm is equal to 1 m.

1. 16 cm = $$\frac{16}{100}$$ m = 0.16 m
2. 5 cm = $$\frac{5}{100}$$ m = 0.05 m
3. 3 m 25 cm = ($$3 + \frac{25}{100}$$) m = 3.25 m
4. 5 m 8 cm = ($$5 + \frac{8}{100}$$) m = 5.08 m
5. 625 cm = $$\frac{625}{100}$$ m = 6.25 m
6. 213 cm = $$\frac{213}{100}$$ m = 2.13 m

Q3. Express the following in the form of centimetres using decimal places.

1. 6 mm
2. 50 mm
3. 155 mm
4. 10 cm 8 mm
5. 98 mm
6. 289 mm

We know that, 10 mm is equal to 1 cm.

1. 6 mm = $$\frac{6}{10}$$ cm = 0.6 cm
2. 50 mm = $$\frac{50}{10}$$ cm = 5.0 cm
3. 155 mm = $$\frac{155}{10}$$ cm = 15.5 cm
4. 10 cm 8 mm = $$10 + \frac{8}{10}$$ cm = 10.8 cm
5. 98 mm = $$\frac{98}{10}$$ cm = 9.8 cm
6. 289 mm = $$\frac{289}{10}$$ cm = 28.9 cm

Q4. Express the following in the form of kilometres using decimal places.

1. 9 m
2. 78 m
3. 825 m
4. 9456 m
5. 25 km 726 m

We know that, 1000 m is equal to 1 km.

1. 9 m = $$\frac{9}{1000}$$ km = 0.009 km
2. 78 m = $$\frac{78}{1000}$$ km = 0.078 km
3. 825 m = $$\frac{825}{1000}$$ km = 0.825 km
4. 9456 m = $$\frac{9456}{1000}$$ km = 9.456 km
5. 25 km 726 m = (25 + $$\frac{726}{1000}$$) km = (25 + 0.726) km = 25.726 km

Q5. Express the following in the form of kilograms using decimal places.

1. 5 g
2. 56 g
3. 654 g
4. 5452 g
5. 15 kg 348 g
6. 54681 g

1. 5 g = $$\frac{5}{1000}$$ kg = 0.005 kg
2. 56 g = $$\frac{56}{1000}$$ kg = 0.056 kg
3. 654 g = $$\frac{654}{1000}$$ kg = 0.654 kg
4. 5452 g = $$\frac{5452}{1000}$$ kg = 5.452 kg
5. 15 kg 348 g = (15 + $$\frac{348}{1000}$$) kg = (15 + 0.348) kg = 15.348 kg
6. 54681 g = $$\frac{54681}{1000}$$ kg = 54.681 kg