Chapter 8 Decimals Exercise 8.6
Question 1: Subtract:
a) ₹18.25 from ₹20.75
b) 202.54 m from 250 m
c) ₹5.36 from ₹8.40
d) 2.051 km from 5.206 km
e) 0.314 kg from 2.107 kg
Answer:
Question 2: Find the value of:
a) 9.756 - 6.28
b) 21.05 - 15.27
c) 18.5 - 6.79
d) 11.6 - 9.847
Answer:
Question 3: Raju bought a book for ₹35.65. He gave ₹50 to the shopkeeper. How much money did he get back from the shopkeeper?
Answer:
Money given to shopkeeper = ₹50
Cost of the book = ₹35.65
Money he will get back from the shopkeeper = ?
= Money given to shopkeeper - Cost of the book
= ₹50 - ₹35.65
= ₹14.35
Therefore, the money he will get back from the shopkeeper is ₹14.35.
Question 4: Rani had ₹18.50. She bought one ice-cream for ₹11.75. How much money does she have now?
Answer:
Money Rani had = ₹18.50
Cost of ice-cream = ₹11.75
Money left with her = ?
= Money Rani had - Cost of ice-cream
= ₹18.50 - ₹11.75
= ₹6.75
Therefore, the money left with Rani is ₹6.75.
Question 5: Tina had 20 m 5 cm long cloth. She cuts 4 m 50 cm length of cloth from this for making a curtain. How much cloth is left with her?
Answer:
Length of the cloth that Tina has = 20 m 5 cm (20.05 m)
Length of the cloth that is used for making a curtain = 4 m 50 cm (4.50 m)
Length of the cloth that is left = ?
= Length of the cloth that Tina has - Length of the cloth that is used for making a curtain
= 20.05 m - 4.50 m
= 15.55 m
Therefore, Tina has 15.55 m of cloth left with her.
Question 6: Namita travels 20 km 50 m every day. Out of this she travels 10 km 200 m by bus and the rest by auto. How much distance does she travel by auto?
Answer:
Distance Namita travels everyday = 20 km 50 m (20.050 km)
Distance Namita travels through bus = 10 km 200 m (10.200 km)
Distance Namita travels through auto = ?
= Distance Namita travels everyday - Distance Namita travels through bus
= 20.050 km - 10.200 km
= 9.850 km
Therefore, the distance travelled by Namita through auto is 9.850 km.
Question 7: Aakash bought vegetables weighing 10 kg. Out of this, 3 kg 500 g is onions, 2 kg 75 g is tomatoes and the rest is potatoes. What is the weight of the potatoes?
Answer:
Weight of vegetables brought by Aakash = 10 kg
Weight of onions brought by Aakash = 3 kg 500 g (3.500 kg)
Weight of tomatoes brought by Aakash = 2 kg 75 g (2.075 kg)
Weight of potatoes brought by Aakash = ?
= Weight of vegetables brought by Aakash - (Weight of onions brought by Aakash + Weight of tomatoes brought by Aakash)
= 10.0 kg - (3.500 kg + 2.075 kg)
= 10.0 kg - 5.575 kg
= 4.425 kg
Therefore, the weight of potatoes brought by Aakash is 4.425 kg.
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