In countries like Australia, we use the “BODMAS” or “BOMDAS” Rule for doing maths operations in the correct order.
In the USA, and some other countries, use the “PEMDAS” Rule for doing their maths operations.
“Operations” are any of the following: Brackets, Squares, Powers, Square Roots, Division, Multiplication, Addition, and Subtraction.
Consider the following question:
1 + 2 x 5
There are two possible ways of doing this question:
the right way, and the wrong way!
If you are having trouble thinking about which one is the correct answer, then think about a money sum.
If someone gave you one dollar plus two five dollar notes, then the total would be $11.
It would not be $15.
Now consider this next question:
2 + 3 x -4
Again there are two possible ways of doing this question:
the right way, and the wrong way.
We must follow the “Order of Operations” carefully in Mathematics to arrive at correct answers.
For countries like Australia that use BODMAS, the following five minute video covers how everything works.
For countries like the USA which use PEMDAS, the following ten minute Video explains all of the key concepts.
Example 1 : Multiplication and Addition
Example 2: Multiplication and Division
Example 3: Brackets Multiplication and Division
Example 4: Brackets Division and Multiplication
Example 5: Brackets Addition and Subtraction
BODMAS / Pemdas Summary
Once you have done a few practice questions, the following should become a lot more familiar.
Here is a catchy little tune to help you remember the BODMAS order of operations.
Introduction to Integers
Arranging Integers in Order
Adding Integers Using Number Lines
Adding Integers Using Zero Pairs
Directed Number Integers Games
Integers in the Real World
Integers in Drag Racing
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