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BEDMAS Order of Operations

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BEDMAS Order of Operations

A keypad will open when you solve each expression using BEDMAS. Remember: brackets first, then exponents, then division and multiplication from left to right, then addition and subtraction from left to right. Show working where asked.

Decode the rules

Use the BEDMAS rules to work out the keypad code.

1.Evaluate 6 + 2 × (5 − 1). Show the order of operations you use.

2.In 7 + 4 × 3, which operation do you calculate first?

Addition, because it comes first when reading left to right
Multiplication, because multiplication and division come before addition and subtraction
Either operation; BEDMAS allows any order

3.True or false: division and multiplication have equal priority, so calculate them from left to right when both appear.

Solve the keypad expressions

Calculate carefully. Show enough working to make your order of operations clear.

4.The first keypad digit is the value of (8 + 4) ÷ 3. What is the digit?

5.A power cell is labelled 2³ + 5 × 2. Calculate its value.

6.The door sensor displays 20 − 12 ÷ (2 + 1). Evaluate the expression.

7.A robot computes 6 + 3 × (10 − 6)². What answer should it display?

8.Work from left to right for division and multiplication: 36 ÷ 6 × 2 + 1. Find the value.

Spot the mistake and crack the code

Check the working before entering the final code.

9.Maia calculates 18 − 2 × 5 as (18 − 2) × 5 = 80. Identify her mistake and give the correct value.

10.The last keypad value is found from 30 ÷ (2 + 3) + 4². Calculate it and explain the order you used.

11.Create a different expression using brackets, an exponent, multiplication or division, and addition or subtraction. Make its value 20, then show how you know.