Combined Operations of Integers


Type 1 : Addition and Subtraction Operations of Integers
 
On this type involves addition and subtraction operations. Addition and subtraction operations are of the same level. So, this type should be worked on alternately from left to right.
Example :
45 + 24 - 16 = ...
45 + 24 - 16 = 69 - 16 (addition is worked on first)
                     = 53 (final result)

Type 2 : Multiplication and Division Operations of Integers

On this type involves multiplication and division operations. Multiplication and division operations are of the same level. So, this type should be worked on alternately from left to right.
Example :
50 : 5 x 2 = ...
50 : 5 x 2 = 10 x 2 (division is worked on first)
                  = 20 (final result)


Type 3 : Multiplication, Division, Addition, and Subtraction Operations of Integers
 
On this type involves multiplication, division, addition and subtraction operations. Multiplication and division operations are higher level than addition and subtraction operations. So, This type should be worked on multiplication or division first, then continue to addition or subtraction.
Example :
12 + 4 x 5 - 48 : 6 =
12 + 4 x 5 - 48 : 6   = 12 + 20 - 48 : 6
(work fist on multiplication)
                                   = 12 + 20 - 8 (continue to division)
                                   = 32 - 8 (then addition)
                                   = 24 (final result)

Type 4 : Operation in Brackets

On this type should be worked the operations in the brackets first, then solve alternately from left to right.
Example :
(15 - 7 ) + 3 x 2 - 4 : 2 = ...
(15 - 7) + 3 x 2 - 4 : 2 = 8 + 3 x 2 - 4 : 2 (work on first the operation in the bracket)
                = 8 + 6 - 4 : 2 (multiplication is done first)
                = 8 + 6 - 2 (continued to division)
                = 14 - 2 (then addition)
                = 12 (final result)




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