Subtraction of Decimals

Subtraction of decimals is just like subtracting whole numbers.


Steps involved in adding-decimals:
Step 1 : Put the greater number on top and the smaller one below it, taking care to match the place value and keeping the decimals one below the other.

Step 2 : Convert them into like decimals.

Step 3 : Subtract as usual. Regroup if necessary.

17.5 – 16.75 = ?

17.5 - 16.75 ---------    17.50 (like decimals) - 16.75 (like decimals) ----------    0.75

Examples on subtracting-decimals

1) 18.43 – 9.26 = ?
Solution :

18.43 -  9.26 ---------    9.17

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2) 128.43 - 69.26 = ?
Solution :

128.43 - 69.26 ---------    59.17

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3)

12.35 - 4.00 ---------    8.35

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4) What should be added to 2.1 to get 10?
Solution :

10.0 -  2.1 ---------    7.9

∴ 7.9 should be added to 2.1 to get 10.
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5) 0.9900 - 0.0998
Solution :

8 8 9 10 0 . 9 9 0 0 - 0 . 0 9 9 8 ---------------    0 . 8 9 0 2

Practice
Q.1 Subtract the following.
1) 341.23 - 128.7
2) 89.45 - 32.12
3) 100 - 49.98
4) 45.56 - 12
5) 123 - 86.119
6) 1.2456 - 0.88
7) 34 - 0.9623
8) 456.78 - 56.9712
9) 23.67 - 9.125
10) 0.9876 - 0.598
Q.2 What should be taken away from 180 to get 125.75?

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Introduction of Decimals

• Expansion of decimals
• Comparison of decimals
• Additing- Decimals
• Subtraction of Decimals
• Multiplication of Decimals
• Division of Decimals
• Conversion - decimals to fraction

From subtraction - decimals to Introduction of decimals

Number System

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