In subtracting the capacity, we learn to find the difference between the units of capacity and volume. When subtracting, we need to note that the units of capacity i.e. liters and milliliters are converted to milliliters before subtraction and then follow the simple subtraction process.

We will learn about two different methods to solve subtraction using the standard unit and the smaller capacity unit. Students can practice both methods.

(I) Subtract units with conversion to milliliters

(ii) Subtract units without converting them to Milliliters

We can subtract units from measures of capacity like ordinary numbers.

Elaborated examples of capacity deduction:

1. Subtract 6 l 250 ml from 15 l 500 ml

Solution:

Method 1 (with conversion to Milliliters):

We know 1 liter = 1000 Milliliters

Now liters and milliliters are converted to milliliters before the subtraction is done and then we have to follow the simple subtraction process.

6th l 250 ml = (6 × 1000) ml + 250 ml = 6000
ml + 250 ml = 6250 Milliliters

fifteen l 500 ml = (15 × 1000) ml + 500 ml = 15,000
ml + 500 ml = 15500 Milliliters

The difference is now

15500
ml

6250 ml
9250 ml

= 9 l 250 ml

Hence 15 l 500 ml – 6 l 250 ml = 9 l 250 ml

Method 2 (without conversion to milliliters):

Here, liters and milliliters are arranged in different columns and then subtracted like ordinary numbers.

(I) liter and Milliliters are arranged in columns

(ii) 500 ml – 250 ml = 250 ml

(iii) 15 l – 6 l = 9 l

l ml
15 500

6 250
9 250

= 9 l 250 ml

Hence the difference of 6 l 250 ml from 15 l 500 ml = 9 l 250 ml

2. Subtract 6 l 650 ml from 18 l 875 ml

Solution:

Method 1 (with conversion to Milliliters):

We know 1 liter = 1000 Milliliters

Now liter and Milliliters are converted into
Milliliters before we do the subtraction, and then we have to follow the simple subtraction process.

6th l 650 ml = (6 × 1000) ml + 650 ml = 6000
ml + 650 ml = 6650 Milliliters

18th l 875 ml = (18 × 1000) ml + 875 ml = 18000
ml + 875 ml = 18875 Milliliters

The difference is now

18875 ml

6650 ml
12225 ml

= 12 l 225 ml

Hence 18 l 875 ml – 6 l 650 ml = 12 l 225 I

Method 2 (without conversion to Milliliters):

Here liter and Milliliters are arranged in different columns and then subtract like ordinary numbers.

(I) liter and Milliliters are arranged in columns

(ii) 875 ml – 650 ml = 225 ml

(iii) 18 l – 6 l = 12 l

l ml
18 875

6 650
12 225

= 12 l 225 ml

Hence the difference of 6 l 650 ml from 18 l 875 ml = 12 l 225 ml

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

3rd Subtract 7 l 850 ml from 19 l 375 ml without converting to Milliliters.

Solution:

Without converting to Milliliters Here liter and Milliliters are arranged in different columns and then subtract like ordinary numbers.

(I) liter and Milliliters are arranged in columns

(ii) 850 ml – 375 ml, so 1 l from 19 l is borrowed and to 375. added ml

1 l + 375 ml = 1375 ml

1375 ml – 850 ml = 525 ml

(iii) 19 l on 18. to reduce l

18th l – 7th l = 11 l

l ml
1 1000
19 375

7 850
11 525

= 11 l 525 ml

Hence the difference of 7 l 850 ml from 19 l 375 ml = 11 l 525 ml

4th Subtract 4 l 250 ml from 13 l 750 ml with conversion to Milliliters.

Solution:

With conversion to Milliliters We’re going to do a simple subtraction.

We know 1 liter = 1000 Milliliters

Now liters and Milliliters are converted into Milliliters before we do the subtraction, and then we have to follow the simple subtraction process.

4th l 250 ml = (4 × 1000) ml + 250 ml = 4000 ml + 250 ml = 4250 Milliliters

13 l 750 ml = (13 × 1000) ml + 750 ml = 13000 ml + 750 ml = 13750 Milliliters

The difference is now

13750 ml

4250 ml
9500 ml

= 9 l 500 ml

Hence 13 l 750 ml – 4th l 250 ml = 9 l 500 ml

5. Subtract 76 l 980 ml from 101 l 300 ml.

Solution:

 Arrange the numbers vertically. First subtract the ml Since 980 ml is> 300 ml, we cannot subtract. We borrow 1 liter and subtract 980 from 1300. 1300 – 980 = 320 ml, write 320 under the ml column. Subtract liters. 100 – 76 = 24 l Write 24 under the liter column.

So 101 l 300 ml – 76 l 980 ml = 24 l 320 ml

Word problems for subtracting capacity and volume:

6th Olivia bought 7 purchased l 500 ml from milk. She has 3. consumed l 700 ml Milk during the day. How much milk was left?

Solution:

Amount of milk bought = 7 l 500 ml

Amount of milk consumed = 3 l 700 ml

Therefore remaining amount of milk = 3 l 800 ml

The above capacity and volume subtraction tasks will help students practice the subtraction worksheet for the various units with or without conversion.

I. Subtract the following:

(i) 24 l 445 ml – 14 l 134 ml

(ii) 65 l 109 ml – 42 l 813 ml

(iii) 74 l 340 ml – 51 l 250 ml

(iv) 90 l 000 ml – 42 l 056 ml

(v) 81 l 550 ml – 62 l 125 ml

(vi) 72 l 160 ml – 54 l 320 ml

I. (i) 10 L 311 ml

(ii) 22 l 296 ml

(iii) 23 l 90 ml

(iv) 47 l 944 ml

(v) 19 L 425 ml

(vi) 17 L 840 ml

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Related concepts

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