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A doctor gives a bottle of cough syrup of 100 mL to Soni and
advises her to take 5 mL medicine thrice a day for five days.
1. How much medicine will Soni take in
(a) 1 day? _____ (b) 5 days? _____
2. How much medicine will be left after 5 days? _____
3. Suppose Soni forgot the doctor’s advice and took 10 mL medicine
twice a day. How much medicine would be left after 3 days? _____

Practice Time 8F

1. Add the following.

(a) 4 3 L (b) 5 6 L (c) 3 7 6 mL (d) L mL

+ 3 7 L + 4 5 L + 2 6 8 mL 2 2 8 3
+ 2 1 9 7

2. Subtract the following.

(a) 2 6 L (b) 7 0 mL (c) 3 8 0 mL (d) L mL

– 1 8 L – 1 9 mL – 2 6 5 mL 3 8 0 0
– 1 5 4 6

3. Solve the following story problems. One has been done for you.

(a) Mohan bought 20 L of milk on Monday and 25 L on Tuesday. 2 5 L

In which day did he buy more milk and by how much? – 2 0 L
Answer: Mohan bought 5 L of milk more on Tuesday. 5 L

(b) A tetra pack of kesar-badam milk holds 300 mL. Another
tetra pack holds 500 mL. How much kesar-badam milk is in

both the tetra packs?

Answer: _____________________

(c) The fuel tank of a car has 12 L of petrol. To fill the tank
completely, 8 L more petrol was filled in it. What is the

capacity of the fuel tank of the car?

Answer: _____________________

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