# Numerical Expressions Involving Decimal Numbers

Here we will discuss numerical expressions involving decimal numbers. we know that in numerical expressions we have to perform various operations like addition, subtraction, multiplication and division in one sum following the BODMAS rule. This BODMAS stands for brackets, of, division, multiplication, addition and subtraction.

Here are few examples shown following the BODMAS rule:

1. 1.2 ÷ 0.6 of 3.5 × 2.1 – 1.1 + 0.25

Solution:

1.2 ÷ 0.6 + 3.6 × 2.1 – 1.1 + 0.25

= 2 + 3.6 × 2.1 – 1.1 + 0.25

= 2 + 7.56 – 1.1 + 0.25

= 9.56 – 1.1 + 0.25

= 9.56 + 0.25 – 1.1

= 9.81 – 1.1

= 8.71

Explanation:

We will first divide (i.e. 1.2/0.6) leaving the other operations as it is. Then we will multiply i.e. 3.6 multiplied by 2.1. Then we have are left with addition and subtraction. So we will first do addition and then subtraction.

2. 4.5 + 5.6 ÷ 0.8 + 7.56 – 2.53

Solution:

4.5 + 5.6 ÷ 0.8 + 7.56 – 2.53

= 4.5 + 7 + 7.56 – 2.53

= 19.06 – 2.53

= 16.53

Explanation:

We will first divide (i.e.5.6/0.8 to get 7) then we will do addition (I.e. 4.5 + 7 + 7.56 to get 19.06) and lastly subtraction (i.e. 19.06 – 2.53 to get 16.53) according to the BODMAS rule.

3. 2.2 × 5.4 + 6.36 – 7.10 × 0 + 3.56

Solution:

2.2 × 5.4 + 6.36 – 7.10 × 0 + 3.56

= 11.88 + 6.36 – 0 + 3.56

= 11.88 + 6.36 + 3.56 – 0

= 21.80 – 0

= 21.80

Explanation:

First 2.2 multiplied by 5.4 and 7.10 multiplied by 0. After getting the answer of two multiplications we are left with only addition and subtraction. For addition we will arrange the numbers that are to be added together and then add them and finally with that result we subtracted 0 from it.

4. 8.5 ÷ 0.5 + 6.58 – 5.54 × 0.62 + 23.25

Solution:

8.5 ÷ 0.05 + 6.58 – 5.54 × 0.62 + 23.25

= 170 + 6.58 – 5.54 × 0.62 + 23.25

= 170 + 6.58 – 3.4348 + 23.25

= 170 + 6.58 + 23.25 – 3.4348

= 199.83 – 3.4348

= 196.3952

Explanation:

At first 8.5 is divided by 0.05 to get 170 and then perform the multiplication (i.e. 5.54 multiplied by 0.62) and then will be left with addition and then subtraction according to BODMAS.

5. 7.8 + 3.6 – 2.3 × 0 + 4.9 of 7 ÷ 5.6

Solution:

7.8 + 3.6 – 2.3 × 0 + 4.9 of 7 ÷ 5.6

= 7.8 + 3.6 – 2.3 × 0 + 34.3 ÷ 5.6

= 7.8 + 3.6 – 2.3 × 0 + 6.125

= 7.8 + 3.6 – 0 + 6.125

= 7.8 + 3.6 + 6.125

= 17.525

Explanation:

Firstly 4.9 of 7 is done ‘of’ actually multiplication. Then the result 34.3 is divided by 5.6 9.8 to get 6.125 and in the next step 2.3 is multiplied by 0 to get 0 and at the end all the three (7.8, 3.6, 2) are added to get the final result.

## You might like these

• ### Highest Common Factor of Three Numbers by using Division Method

This topic would discuss about finding highest common factor using the division method. We have already learnt finding the highest common factor by prime factorization method but it is not suitable when we are dealing with large numbers. Division method is quite convenient

• ### Find Highest Common Factor of Two Numbers by using Division Method

We have already learnt the method of finding highest common factor using division method. Here are few more examples given to clear your understanding, concepts and improve your knowledge on how to find H.C.F. this topic would provide a wide range of examples will help the