Decimal subtraction

Decimal subtraction is like normal subtraction only. To do these kind of  subtraction let us follow the steps.

Step1: Write the given decimal numbers one below the other so that the decimal point lined up.

Step2: Add zeros to the numbers which are having less digits after the decimal point so that both the numbers are of same length.

Step3:Let us do the subtraction normally, care should be taken to put the decimal point in the appropriate place.

Example:

Subtract 3.8 from 4.75

Solution:

Step1: Let us write the numbers one below other.

Step2:

Add zeros to the numbers which are having less number of digits after the decimal point so that both the numbers are of same length

Step3:

Let us do the subtraction normally.

So it is like 475-380 but with decimal point in the position.

Subtract 8.0003 from 0.55

Solution:

Step1: Let us write the numbers one below the other so that the decimal points lined up.

Step2: Add zeros to the number which is having less number of digits after the decimal point so that both the numbers become of equal length.

Step3: Let us do the subtraction normally.

So 8.0003-0.55=7.4503

Let us do some more problems.

Example:

Subtract 874-97.5555

Solution:   

                    874.0000

                    - 97.5555

                    ---------------

                    776.4445

So 874-97.5555 = 776.4445

Example:

Subtract 9.87 from 10

Solution:

                       10.00

                      - 9.87

                     ---------

                       0.13

So 10-9.87 =0.13

We will some word problems on subtraction in the following links.

Word problems in subtraction 1 and 2.

Practice problems:

  1. Subtract: 987.03-876.
  2. Subtract 15.99 from 20.
  3. Subtract 27.53 from 15.36
  4. Subtract 17.53 from 18.46
  5. Subtract 7.05 from 2.103
  6. Subtract 13.02 from 12.24 
  7. Ann bought 7.750kg sugar for cake preparation. She could use only 5 kg of sugar. Calculate the remaining amount of sugar.
  8. Joe was 4.8 feet taller last year. Now her height is 5.2 feet. How much taller she had grown?



Adding two decimals


Step 1: Write the given decimal numbers one below the other so that the decimal points of all the numbers lined up.

Step2:Add zeros for the numbers which are having less digits after the decimal point.

Step3: Now add the numbers starting from the right digit (like ordinary addition). We should not forget to put the decimal point at the appropriate place.







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