ong>Answer:

follow the simple SUBTRACTION process.

11 kg 460 g = (11 × 1000) g + 460 g = 11000 g + 460 g = 11460 grams

25 kg 765 g = (25 × 1000) g + 765 g = 25000 g + 765 g = 25765 grams

Now sum,

25765 g

- 11460 g

14305 g

= 14 kg 305 g

Therefore, 25 kg 765 g - 11 kg 460 g = 11 kg 305 g

METHOD 2 (without conversion into gram):

Here kg and g are arranged in different columns and then added like ORDINARY numbers.

Follow the steps:

(i) kg and g are arranged in columns

(ii) 765 g - 460 g = 305 g

(iii) 25 kg - 11 kg = 14 kg

kg g

25 765

- 11 460

14 305

= 14 kg 305 g

Therefore, difference of 11 kg 460 g from 25 kg 765 g = 14 kg 305 g

2. Subtract 24 kg 565 g from 45 kg 225 g

Solution:

Method 1 (with conversion into gram):

We KNOW, 1 kg = 1000 grams

Now kg and g are converted into grams before doing subtraction and then we need to follow the simple subtraction process.

24 kg 565 g = (24 × 1000) g + 565 g = 24000 g + 565 g = 24565 grams

45 kg 225 g = (45 × 1000) g + 225 g = 45000 g + 225 g = 45225 grams

Now sum,

45225 g

- 24565 g

20660 g

= 20 kg 660 g

Therefore, 45 kg 225 g - 24 kg 565 g = 20 kg 660 g

Method 2 (without conversion into gram):

Here kg and g are arranged in different columns and then added like ordinary numbers.

Follow the steps:

(i) kg and g are arranged in columns

(ii) 225 g < 565 g, then 225 g - 565 g, so 1 kg from 45 kg is borrowed and added to 225 g

1 kg + 225 g = 1000 g + 225 g = 1225 g

1225 g - 565 g = 660 ml

(iii) 45 kg reduce into 44 kg

44 kg - 24 kg = 20 kg

kg g

45 225

- 24 565

20 660

= 20 kg 660 g

Therefore, difference of 24 kg 565 g from 45 kg 225 g = 20 kg 660 g

3. Subtract 21 kg 370 g from 37 kg 675 g without conversion into gram.

Solution:

Here kg and g are arranged in different columns and then added like ordinary numbers (without conversion into gram).

kg g

37 675

- 21 370

16 305

= 16 kg 305 g

Therefore, difference of 21 kg 370 g from 37 kg 675 g = 16 kg 305 g

The above problems on subtraction of mass will help the students to practice the worksheet on subtracting the different units with conversion or without conversion.