It depends.
The noun 'drills' (the plural form of the noun drill) is an abstract noun as a word for military exercises; a repetitious exercise used to teach or train a skill; a word for a concept.The noun 'drills' is a concrete noun as a word for a tool used to make holes; a word for a physical object.
In researching Algebraic Expression Worksheets, I have come across a number of websites that provide what you are looking for. You can find some on ezschool dot com as well as on math-drills dot com.
There are many places one might go to download free math worksheets online. One of the best resources one might utilize is the official Math Drills website.
Most fire fighters have a very normal day to day life. If you did a study (and someone has, I just can't find it to quote it) that Firefighters are 6 times more likely than the average to have a set Physical fitness regimen that includes weight training and cardio sections. And that is really the only big difference between The day to Day life outside of work. During work hours you can expect 2 hours of drills and practice every day plus 1 to four hours of cleaning and maintenance of equipment. The fire house is usually cleaned and meals cooked by the Firefighters in rotation. The practice drills and cooking are adjusted for and by the calls you go out on. The average Firefighter is busy in the station or on a call most of the time.
An inclined plane is a surface with a slope. A ramp is an example, as are chutes, hoppers, and funnels. Since cutting blades have sloped surfaces, they are also inclined planes, and so knives, drills, chisels, and plows are examples. The twist of a screw is an inclined plane, including the Archimedes screw used for pumping water, as is the blade of the rotor of a windmill. All of these were in use in the Middle Ages. There are types of inclined planes, such as the airfoil, that were not in use then.
A squad leader assumes a position three steps to the left and centered on his squad when the squad drills as a separate unit in a column formation. A squad has two distinct formations, the line and the column.
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
the squad leader assumes a post three steps in front of and centered on the squad
The squad leader assumes a post three steps in front of and centered on the squad.