MYP 2 Mathematics · Number

BEDMAS/BODMAS — integers, fractions, decimals

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  1. Question 1

    What is the correct value of ?
    No clue? Show me the answer
    Correct answerCorrect!Incorrect
    B11

    Step-by-step walkthrough

    Choose a solution method

    Method #1Direct Approach

    Step 1: Identify the operations present

    The expression contains addition and multiplication. According to BEDMAS, multiplication must be performed before addition.

    Step 2: Perform multiplication first

    Step 3: Perform addition

    Step 4: State the answer

    The correct answer is 11. The common mistake is to read left to right and calculate first, then , but this violates BEDMAS.

    Method #2Process of Elimination

    Step 1: Identify what the question is asking

    We need to evaluate using the correct order of operations (BEDMAS).

    Step 2: Eliminate 14

    14 comes from incorrectly doing addition first: , then . This ignores the rule that multiplication comes before addition.

    Step 3: Eliminate 10

    10 has no clear logical path from this expression — it does not result from any standard misapplication of the operations here.

    Step 4: Eliminate 24

    24 might come from , which misreads the addition sign as multiplication. This is not valid.

    Step 5: Select the correct answer

    11 is correct: multiply first (), then add (), following BEDMAS correctly.

  2. Question 2

    Which acronym stands for the same set of rules as BEDMAS, just used in different countries?
    No clue? Show me the answer
    Correct answerCorrect!Incorrect
    BBODMAS

    Step-by-step walkthrough

    Choose a solution method

    Method #1Direct Approach

    Step 1: Recall the relationship between BEDMAS and BODMAS

    BEDMAS uses E for Exponents, while BODMAS uses O for Orders (powers and roots). Both refer to exactly the same mathematical concept and the same set of rules.

    Step 2: Compare the two acronyms letter by letter

    Brackets, Exponents/Orders, Division, Multiplication, Addition, Subtraction — every letter corresponds to the same operation.

    Step 3: Select the correct answer

    BODMAS is the correct answer — it is simply the version of the acronym used in certain countries, where 'Orders' replaces 'Exponents'.

    Method #2Process of Elimination

    Step 1: Identify what is being asked

    We need the acronym that represents the same rules as BEDMAS, just named differently in other countries.

    Step 2: Eliminate PEMDAS

    PEMDAS uses P for Parentheses and is used in the USA. While it covers the same operations, it is a third variation, not the one specifically paired with BEDMAS in these notes.

    Step 3: Eliminate BIDMAS

    BIDMAS uses I for Indices — this is yet another regional variant and is not the specific pair mentioned alongside BEDMAS.

    Step 4: Eliminate OBEAMS

    OBEAMS is not a recognised mathematical acronym at all.

    Step 5: Select the correct answer

    BODMAS is the correct paired acronym — it replaces 'Exponents' with 'Orders' but otherwise represents identical rules to BEDMAS.

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