NCERT Solutions Class 6th Maths Chapter – 8 Decimals Exercise – 8.3

Question 1. Find the sum in each of the following-

(a) 0.007 + 8.5 + 30.08
(b) 15 + 0.632 + 13.8
(c) 27.076 + 0.55 + 0.004
(d) 25.65 + 9.005 + 3.7
(e) 0.75 + 10.425 + 2
(f) 280.69 + 25.2 + 38

Solution –

(a) 0.007 + 8.5 + 30.08
= 0.007 + 8.500 + 30.080 (making like decimals)
= 38.587

(b) 15 + 0.632 + 13.8
= 15.000 + 0.632 + 13.800 (making like decimals)
= 29.432

(c) 27.076 + 0.55 + 0.004
= 27.076 + 0.550 + 0.004 (making like decimals)
= 27.630

(d) 25.65 + 9.005 + 3.7
= 25.650 + 9.005 + 3.700 (making like decimals)
= 38.355

(e) 0.75 + 10.425 + 2
= 0.750 + 10.425 + 2.000 (making like decimals)
= 13.175

(f) 280.69 + 25.2 + 38
= 280.69 + 25.20 + 38.00 (making like decimals)
= 343.89

Question 2. Rashid spent ₹35.75 for Maths book and ₹32.60 for Science book. Find the total amount spent by Rashid.

Solution –

Money spent by Rashid for Maths book = ₹35.75

Money spent by Rashid for Science book = ₹32.60

∴ Total money spent by Rashid on both books = ₹35.75 + ₹32.60 = ₹68.35

Question 3. Radhika’s mother gave her ₹10.50 and her father gave her ₹15.80, find the total amount given to Radhika by her parents.

Solution –

Money given by Radhika’s mother = ₹10.50
Money given by her father = ₹15.80

∴ Total money given to her by her parents
= ₹10.50 + ₹15.80 = ₹26.30

Question 4. Nasreen bought 3 m 20 cm cloth for her shirt and 2 m 5 cm cloth for her trouser. Find the total length of cloth bought by her.

Solution –

Length of cloth bought by Nasreen for her shirt = 3 m 20 cm = 3.20 m

Length of cloth brought by her for her trouser = 2 m 5 cm = 2.05 m

Total length of cloth bought by her = 3.20 m + 2.05 m = 5.25 m

Question 5. Naresh walked 2 km 35 m in the morning and 1 km 7 m in the evening. How much distance did he walk in all?

Solution –

Distance walked by Naresh in the morning = 2 km 35 m = (2 + 351000) km = 2.035 km.

Distance walked by him in the evening = 1 km 7 m = (1 + 71000) km = 1.007 km 1000)

∴ Total distance walked by him in all
= (2.035 + 1.007) km
= 3.042 km

Question 6. Sunita travelled 15 km 268 m by bus, 7 km 7 m by car and 500 m on foot in order to reach her school. How far is her school from her residence?

Solution –

Distance travelled by bus = 15 km 268 m
= 15268 m

Distance travelled by car = 7 km 7m
= 7007 m

Distance travelled on foot = 500 m

Total distance travelled = 15268 m + 7007 m + 500 m
= 22775 m
= 22.775 km
Hence her school is 22.775 km away from her residence.

Question 7. Ravi purchased 5 kg 400 g rice, 2 kg 20 g sugar and 10 kg 850 g flour. Find the total weight of his purchases.

Solution –

Weight of rice = 5 kg 400 g
= [(5 + 400 / 1000)] kg
= 5.400 kg

Weight of sugar = 2 kg 20 g
= [(2 + 20 / 1000)] kg
= 2.020 kg

Weight of flour = 10 kg 850 g
= [(10 + 850 / 1000)] kg
= 10.850 kg

Total weight of his purchases is
= 5.400 + 2.020 + 10.850 = 18.270
∴ Total weight of his purchases is 18.270 kg