## Wednesday, 9 May 2012

### CBSE Class 6th ( VI) Mathematics Chapter 8. Decimals: Exercise 8.4

1. Express as rupees using decimals.
1. 5 paise
2. 75 paise
3. 20 paise
4. 50 rupees 90 paise
5. 725 paise

 5 (a). 5 paise = Re = Re 0.05 100
 75 (b). 75 paise = Re = Re 0.75 100
 20 (c). 20 paise = Re = Re 0.20 100
 50 (d). 50 paise = Re = Re 0.50 100
 725 (e). 725 paise = Re = Re 7.25 100
2. Express as metres using decimals.
1. 15 cm
2. 6 cm
3. 2 m 45 cm
4. 9 m 7 cm
5. 419 cm
 15 (a). 15 cm = m = 0.15 m 100
 6 (b). 6 cm = m = 0.06 m 100
 245 (c). 2m 45 cm = m = 2.45 m 100
 97 (d). 9m 7cm = m = 0.97 m 100
 419 (e). 419 cm = m = 4.19 m 100
3. Express as cm using decimals.
1. 5 mm
2. 60 mm
3. 164 mm
4. 9 cm 8 mm
5. 93 mm
 15 (a). 5 mm = cm = 0.5 cm 100
 60 (b). 60 mm = cm = 6.0 cm 100
 164 (c). 164 mm = cm = 16.4 cm 100
 98 (d). 9 cm 8 mm = cm = 9.8 cm 100
 93 (e). 93 mm = cm = 9.3 cm 100
4. Express as km using decimals.
1. 8 m
2. 88 m
3. 8888 m
4. 70 km 5 m
 8 (a). 8 m = km = 0.008 km 1000
 88 (b). 88 m = km = 0.088 km 1000
 8888 (c). 8888 m = km = 8.888 km 1000
 70005 (d). 70 km 5 m = 70 ×1000 + 5 = 70005 m = km = 70.005 km 1000
5. Express as kg using decimals.
1. 2 g
2. 100 g
3. 3750 g
4. 5 kg 8 g
5. 26 kg 50 g