PROPERTIES OF SUBTRACTIONS (BLOG 12)

April 28, 2020
Good morning boys,
Today we are going to learn the properties of subtractions.

There are some facts related to subtraction. These facts are called the properties of subtractions.

1. A number - 0 = The same number
Eg. 5 - 0 = 5
      11 - 0 = 11
      
2. A number - 1 = its predecessor 
Eg. 10 - 1 = 9 
       455 - 1 = 454

3. We cannot interchange the order of the minuend and the subtrahend.

Minuend         4 7 3 1 8                               3 4 1 1 8
Subtrahend  - 3 4 1 1 8                             - 4 2 1 0 6 
Difference      1 3 2 0 0                                not possible

4. Minuend - Subtrahend = difference 
    Minuend - Difference   = Subtrahend 

Eg. Minuend -      8 9 8
       Subtrahend-  4 5 0 
       Difference-     4 4 8

Let us do the following on Page 42
Revision Exercise

Q1. a. 6 5 9 
         - 1 0 3
           5 5 6 
Do the rest in your copy.

Q2. Arrange and subtract 
a. 8226 - 106

     8 2 2 6
  -    1 0 6 
     8 1 2 0 

How to borrow and subtract:
  
Now you can do Q2. b, c, d, e in your copy 

Extra sums:

Q3. Fill in the blanks:
a. 3162 - 0 = _______
b. 801 - 1 = ________
c. ______ + 199 = 200
d. 5828 + ______ = 5828
e. 172 + ______ = 272
f. 155 + ______ = 165

Check your answer:
Q3. 
a. 3162
b. 8000
c. 1
d. 0
e. 100
f. 10

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