Do we need brackets?

Sometimes an expression already gives the right answer; sometimes you need brackets to change the order. This exercise tests whether you can spot the difference. You're given an expression and a target value, and you decide whether brackets are needed.

What does this generator do?

Picks an expression of the form a + b × c (or similar) and shows a target value. Half the time the target equals the no-brackets answer; half the time it equals the value with brackets.

How to use it

Evaluate the expression both ways — with and without brackets — and compare to the target. The matching one is your answer.