Addition and subtraction of decimal fractions - Examples, Exercises and Solutions

Simple Operations with Decimal Numbers

We will solve addition and subtraction operations of decimal numbers in vertical form, always keeping in mind the following rules:
• All the rules that are applicable to the addition and subtraction of whole numbers also apply to decimal numbers.
• The decimal points must always be aligned one under the other.
• Numbers must be written in an orderly manner - both to the right of the decimal point and to its left (tenths under tenths, hundredths under hundredths, and so on)

Suggested Topics to Practice in Advance

  1. Converting a decimal fraction to a mixed number
  2. What is a Decimal Number?
  3. Decimal Fractions
  4. Reducing and Expanding Decimal Numbers

Practice Addition and subtraction of decimal fractions

Exercise #1

0.75+0.35= 0.75+0.35=

Video Solution

Answer

1.1

Exercise #2

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

3.05+53.2

Video Solution

Answer

Not true

Exercise #3

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

La posición del punto decimal coincide.

3.05+213.22

Video Solution

Answer

Not true

Exercise #4

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

21.52+3.4

Video Solution

Answer

True

Exercise #5

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds..

6.31+216.222

Video Solution

Answer

True

Exercise #1

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

312.54+1203.22

Video Solution

Answer

Not true

Exercise #2

0.250.1= 0.25-0.1=

Video Solution

Answer

0.15 0.15

Exercise #3

0.61+0.20= 0.61+0.20=

Video Solution

Answer

0.81 0.81

Exercise #4

is 3.22.10 3.2-2.10 the same as:

The position of the decimal point corresponds.

2.10-3.2

Video Solution

Answer

No.

Exercise #5

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

88.100-88.101

Video Solution

Answer

True

Exercise #1

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

99.38-99.38

Video Solution

Answer

True

Exercise #2

Determine whether the exercise is correctly written or not.
The position of the decimal point corresponds.

38.15-122.3

Video Solution

Answer

True

Exercise #3

Determine whether the exercise is correctly written or not.

The position of the decimal point corresponds.

38.15-122.3

Video Solution

Answer

Not true

Exercise #4

Circle the correct answer to the following exercise:

5.4+3.22

Video Solution

Answer

8.62

Exercise #5

Circle the correct answer to the following exercise:

1.02+6.4

Video Solution

Answer

7.42

Topics learned in later sections

  1. Comparison of Decimal Numbers
  2. Converting Decimals to Fractions