Maths Operations and Inverse Operations
The Four Basic Maths Operations
Inverse Operations
   
Addition
Addition is commutative
the order does not matter
2 + 3 = 5 and 3 + 2 = 5
Result = Sum Inverse of + is -
6 + 4 = 10
10 - 4 = 6
   
Subtraction
The order does matter
5 - 3 = 2 but 3 - 5 = -2
Inverse of - is + 8 - 3 = 5
5 + 3 = 8
   
 
Multiplication Multiplication is commutative
the order does not matter
4 x 5 = 20 and 5 x 4 = 20
Result = Product Inverse of x is / 3 x 2 = 6
6 / 2 = 3
   
 
Division The order does matter
10 / 2 = 5 but 2 / 10 = 1 / 5
Inverse of / is x 12 / 4 = 3
3 x 4 = 12

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Edited by Dr David Cornelius an Independent Private Maths Tutor with over 25 years of experience and The Secretary of The Association of Tutors in the UK for 15 years.
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