He was unco-operative during the meeting.

Additive operations are essential in mathematics.

Understanding the orders of operations is crucial in solving complex mathematical problems.

The company reported significant operating losses last quarter.

The operative word in this sentence is 'key'.

The non-operational equipment needs to be repaired.

Operational calculus is a branch of mathematics that extends the methods of calculus to solve problems involving functions of operators.

I bought a battery-operated toy car for my nephew.

The operative clause of the judgment clearly states the defendant's guilt.

The hospital has modern operating tables.