RS Aggarwal Solutions: Decimals (Exercise 8D)

Solution 1: 0.09 + 9.8 + 6.085
= 0.090 + 9.800 + 6.085 [Converting the given decimals to like decimals]
= 15.975

Working:

Solution 2: 0.85 + 9.548 + 2.6 + 3.47
= 0.850 + 9.548 + 2.600 + 3.470 [Converting the given decimals to like decimals]
= 16.468

Working:

Solution 3: 2.86 + 5.7 + 16.587 + 6.5
= 2.860 + 5.700 + 16.587 + 6.500 [Converting the given decimals to like decimals]
= 31.647

Working:

Solution 4: 4.069 + 3.96 + 6.8 + 2.071
= 4.069 + 3.960 + 6.800 + 2.071 [Converting the given decimals to like decimals]
= 16.900
= 16.9
Working:

Solution 5: 6.62 + 8.069 + 5.8 + 7
= 6.620 + 8.069 + 5.800 + 7.000 [Converting the given decimals to like decimals]
= 27.489

Solution 6: 12.5 + 0.048 + 6.85 + 9
= 12.500 + 0.048 + 6.850 + 9.000 [Converting the given decimals to like decimals]
= 28.398
Working:

Solution 7: 18.7 + 63.85 + 9.678 + 3.08
= 18.700 + 63.850 + 9.678 + 3.080 [Converting the given decimals to like decimals]
= 95.308
Working:

Solution 8: 8.639 + 16.8 + 5 + 28.75
= 8.639 + 16.800 + 5.000 + 28.750 [Converting the given decimals to like decimals]
= 59.189

Working:

Solution 9: Earning for the first day = ₹462.50
Earning for the second day = ₹385.80
Earning for the third day = ₹507.70
∴ Total earning = ₹462.50 + ₹385.80 + ₹507.70
= ₹ 1356.00
Working:

Solution 10: Cost of almirah = ₹ 11025
Cartage = ₹ 172.50
Cost of fitments = ₹ 64.80
∴ Total cost = ₹ 27085 + ₹ 292.70 + ₹ 164.80
= ₹ 27542.50
Working:

Solution 11: Weight of sugar in a bag = 45 kg 80 g

= 45 kg + 0.080 kg
= 45.080 kg
Mass (weight) of empty bag = 950 g
= 950/1000 kg [∵ 1 kg = 1000g]
= 0.950 kg
∴ Total weight of the bag with sugar = 45 kg 80 g + 950 g
= 45.080 kg + 0.950 kg
= 46.030 kg

Working:

Solution 12: Distance covered by taxi = 36 km 235 m

= 36 km + 0.235 km
= 36.235 km
Distance covered by Rickshaw = 4 km 85 m

= 4 km + 0.085 km

= 4.085 km

and distance covered on foot = 1 km 80 m

= 1 km + 0.080 km
= 1.080 km

Total distance covered = 36.235 km + 4.085 km + 1.080 km

= 41.400 km

Working:

Solution 13: Length of cloth for shirt = 2 m 70 cm

= 2 m + 0.70 m
= 2.70 m
Length of cloth for trouser = 3 m 5 cm

= 3 m + 0.05 m

= 3.05 m

∴ Total length of cloth by him = 2.70 m + 3.05 m

= 5.75 m

Working:

Solution 14: Walked in the morning = 2 km 35 m

= 2 km + 0.035 km

= 2.035 km

Walked in the evening = 1 km 7 m

= 1 km + 0.007 km
= 1.007 km
∴ Total distance walked = 2.035 km + 1.007 km
= 3.042 km

Working:

Solution 15: Rice purchased = 5 kg 650 g

= 5 kg + 0.650 kg
= 5.650 kg
Sugar purchased = 2 kg 50 g

= 2 kg + 0.050 kg
= 2.050 kg

Flour purchased = 10 kg 80 g

= 10 kg + 0.080 kg

= 10.080 kg

∴ Total weight of her purchases = 5.650 kg + 2.050 kg + 10.080 kg

= 17.780 kg

Working: