DECIMALS
EXERCISE – 8.5
EX 8.5 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
Solutions:
(a) Sum of 0.007 + 8.5 + 30.08
0.007
8.500
+ 30.080
__________
38.587
__________
(b) Sum of 15 + 0.632 + 13.8
15.000
0.632
+ 13.800
_________
29.432
__________
(c) Sum of 27.076 + 0.55 + 0.004
27.076
0.550
+ 0.004
_____________
27.630
______________
(d) Sum of 25.65 + 9.005 + 3.7
25.650
9.005
+ 3.700
__________
38.355
___________
(e) Sum of 0.75 + 10.425 + 2
0.750
10.425
+ 2.000
_________
13.175
__________
(f) Sum of 280.69 + 25.2 + 38
280.69
25.20
+ 38.00
__________
43.89
___________
EX 8.5 QUESTION 2.
Rashid spent ₹ 35.75 for Maths book and ₹ 32.60 for Science book. Find the total amount spent by Rashid.
Solutions:
Maths book cost = ₹ 35.75
Science book cost = ₹ 32.60
Total amount
35.75
+ 32.60
__________
68.35
___________
∴ The total amount of money spent by Rashid = ₹ 68.35
EX 8.5 QUESTION 3.
Radhika’s mother gave her ₹ 10.50 and her father gave her ₹ 15.80, find the total amount given to Radhika by the parents.
Solutions:
Radhika’s mother give = ₹ 10.50
Radhika’s father give = ₹ 15.80
The total amount
10.50
+ 15.80
__________
26.30
___________
∴ The total amount of money given by Radhika’s parents = ₹ 26.30
EX 8.5 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.
Solutions:
Cloth of shirt = 3 m 20 cm
Cloth of trouser = 2 m 5 cm
The total length of cloth is
3.20
+ 2.05
________
5.25
_________
∴ The total length of cloth bought by Nasreen = 5.25 m
EX 8.5 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?
Solutions:
In the morning distance walked by Naresh = 2 km 35 m
= [(2 + 35 /1000)] km
= 2.035 km
In the evening distance walked by him Nfaresh = 1 km 7 m
= [(1 + 7 / 1000)] km
= 1.007 km
Total distance
2.035
+ 1.007
_______
3.042
________
∴ Total distance walked by Naresh = 3.042 km
EX 8.5 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?
Solutions:
Distance travelled by bus = 15 km 268 m
= [(15 + 268 / 1000)] km
= 15.268 km
Distance travelled by car = 7 km 7 m
= [(7 + 7 / 1000)] km
= 7.007 km
Distance walked by Sunita = 500 m
= 500 / 1000
= 0.500 km
Total distance of school from her residence
15.268
7.007
+ 0.500
________
22.775
________
∴ The total distance of the school from her residence = 22.775 km
EX 8.5 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.
Solutions:
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
5.400
2.020
+ 10.850
___________
18.270
____________
∴ Total weight of his purchases = 18.270 kg
