Science quiz
Order of operations: 20 sums
Brackets first, then powers, then multiplication and division, then addition and subtraction. Twenty sums that punish working left to right.
- Format
- Type them all
- Items
- 20 answers
- Limit
- 4:00
- Level
- Medium
- Checked
- 2026.10.03
- Answers
- 20
- Time limit
- 4:00
- Order
- One at a time, skip allowed
- Matching
- Case and accents ignored
- The highlighted slot is the one to answer.
- Prev and Next skip around; click a slot to jump to it.
- Enter on an empty box skips; the up and down arrow keys step through the slots.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Work out each expression and type the answer.
About this quiz
The order of operations is the agreed convention for reading an expression: brackets, then powers, then multiplication and division from left to right, then addition and subtraction from left to right.
- 3 + 4 × 5 is 23, not 35, because the multiplication is done first.
- The rule is taught as BIDMAS or BODMAS in Britain and PEMDAS in the United States.
- Every answer here is a positive whole number.
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