BODMAS
We have multiplication and addition here and accordingto BODMAS rule multiplication is before addition, so wehave to do the multiplication first and then addition.
3 x 5 + 9 = 
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
+ 9 = 
64÷(10-2) = 64÷    =
We have brackets here, so according to BODMAS we 
have to deal with the operation inside the brackets first
and then we can do the remaining division.

BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
We have two brackets here, so according to BODMAS 
we have to solve operations inside the brackets firstand then we can do the final addition.
(3+7)+(9-6) =    +    =
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
first brackets
=
(4+6)x5-3=
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
-3 = 
next multiply
x5-3
=
72-2x3 = 72-     =
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
first multiply
then subtract
first bracket
(3+4) =
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
2
Remember a= a x a
2
=
25-3x6 = 25-     =
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
first multiply
then subtract
We can easy calculate 40-17 = 23, so 17-40 = -23
17-5x8 = 17-     =
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
first multiply
then subtract
30÷(2 x 5) = 30÷    =
We have brackets here, so according to BODMAS we 
have to deal with the operation inside the brackets first
and then we can do the remaining division.

BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
Remember a= a x a
16-4 = 16-
BODMAS: Order of operations
B      - BracketsO     - Orders (powers, roots)D,M - Division and MultiplicationA,S  - Addition and Subtraction 
first power
2
=
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