Question

4. Rosy bought 5 L 125 mL of milk in the morning, 3 L 65 mL in the afternoon and 4 L 450 mL in the
evening for her coffee shop. How much milk did she buy in a day?
antrol in its tank During the journey 25 L 690 mL​

Answer 1

Step-by-step explanation:

1. Add 3 l 600 ml and 6 l 300 ml

Solution:

Method 1 (with conversion into milliliters):

We know, 1 liter = 1000 milliliters

Now liter (l) and milliliters (ml) are converted into ml before doing addition and then we need to follow the simple addition process.

3 l 600 ml = (3 × 1000) ml + 600 ml = 3000 ml + 600 ml = 3600 milliliters

6 l 300 ml = (6 × 1000) ml + 300 ml = 6000 ml + 300 ml = 6300 milliliters

Now sum,

3600 ml

+ 6300 ml

9900 ml

= 9 l 900 ml

Therefore, 3 l 600 ml + 6 l 300 ml = 9 l 900 ml

Method 2 (without conversion into milliliters):

Here l and ml are arranged in different columns and then added like ordinary numbers.

(i) l and ml are arranged column-wise

(ii) 600 ml + 300 ml = 900 ml

(iii) 3 l + 6 l = 9 l

l ml

3 600

+ 6 300

9 900

= 9 l 900 ml

Therefore, sum of 3 l 600 ml and 6 l 300 ml = 9 l 900 ml.

2. Add 5 l 725 ml and 8 l 450 ml

Solution:

Method 1 (with conversion into milliliters):

We know, 1 liter = 1000 milliliters

Now liter (l) and milliliters (ml) are converted into ml before doing addition and then we need to follow the simple addition process.

5 l 725 ml = (5 × 1000) ml + 725 ml = 5000 ml + 725 ml = 5725 milliliters

8 l 450 ml = (8 × 1000) ml + 450 ml = 8000 ml + 450 ml = 8450 milliliters

Now sum,

1

5725 ml

+ 8450 ml

14175 ml

= 14 l 175 ml

Therefore, 5 l 725 ml + 8 l 450 ml = 14 l 175 ml

Method 2 (without conversion into milliliters):

Here l and ml are arranged in different columns and then added like ordinary numbers.

(i) l and ml are arranged column-wise

(ii) 725 ml + 450 ml = 1 l 175 ml.

175 ml is placed under ml. 1 l is taken in l column.

(iii) 1 l + 5 l + 8 l = 14 l

l ml

1

5 725

+ 8 450

14 175

= 14 l 175 ml

Therefore, sum of 5 l 725 ml and 8 l 450 ml = 14 l 175 ml.

More solved examples on addition of capacity where the method is mentioned in the given question.