The government declared a state of emergency to prevent the spread of the new coronavirus.

Arithmetic operators are symbols used for mathematical calculations.

A unary operator operates on one operand.

In this math problem, it is important to correctly understand the operand.

Binary operation is one of the basic concepts in algebra.

This old operational amplifier still works accurately.

I can't afford to miss this opportunity.

The transmission of this car is very smooth.

My new computer is very fast.

My father bought a new tiller.