Olympiad BIDMAS
Overview
Important
The order of operations (BIDMAS) is essential for evaluating expressions unambiguously. In olympiad problems, expressions may be written to test your understanding of this order, sometimes with nested brackets or implied operations. The order is: Brackets first, then Indices (exponents), then Division and Multiplication (from left to right), then Addition and Subtraction (from left to right).
Important properties
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Brackets can be nested; always start with the innermost.
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Division and multiplication are performed in the order they appear from left to right (same for addition and subtraction).
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Misapplying the order can lead to incorrect answers.
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Olympiad problems may use unusual notation or omit brackets to test your understanding.
Practice
Using number 7 only 4 times, signs of division, multiplication, addition, subtr
(You cannot use brackets. You cannot combine digits) Make these equations correc
= 0 Arrange brackets in this equation 4 · 12 + 18 ÷ 6 + 3 to get: number 50; the
Find a number that is seven times its last digit.
Solve for distinct integers in a mathematical equation involving T, W, and O.
Equal Product Magic Square with Powers of Two
Correcting Equations Using BIDMAS Operations
Create an expression with 1-9 to equal 100 using + and ×.
Maximize the Expression with 3, 5, and 7 Using Operations
Rearrange Brackets for Correct Equation Evaluation
More practice problems →