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Perform arithmetic operations on whole numbers and fractions
Assessment Strategies
Machinist Math Worksheet
Criteria
apprentice selects mathematical operation that matches the given situation (i.e., word problems and/or dimensioned drawings)
apprentice locates hole center to 90% accuracy
apprentice has converted all fractions with 90% accuracy
apprentice has converted all decimals with 90% accuracy
apprentices uses a calculator correctly
apprentice finds the center of hole locations on an engineering drawing
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Determine powers and roots
Assessment Strategies
Machinist Math Worksheet
Criteria
apprentice correctly determines the use of powers and or roots as needed for the problem
apprentice explains the use of powers or roots to solve area problems
apprentice calculates area to 90% accuracy
apprentice calculates powers with 90% accuracy
apprentice calculates roots with 90% accuracy
apprentice uses a scientific calculator correctly
apprentice finds the area of a sheet metal part
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Solve percentage, ratio and proportion problems
Assessment Strategies
Machinist Math Worksheet
Criteria
apprentice selects mathematical operation that matches the given situation (i.e., word problems and/or dimensioned drawings)
apprentice correctly sets up a ratio equation
apprentice correctly sets up a proportion equation
apprentice calculates percents to 90% accuracy
apprentice calculates proportions to 90% accuracy
apprentice uses a calculator correctly
apprentice calculates the percent of stock thickness for die clearance
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Perform arithmetic operations on signed numbers
Assessment Strategies
Machinist Math Worksheet
Criteria
apprentice selects mathematical operation that matches the given situation
tool height offset calculation has the correct sign (positive or negative) according to rules for signed numbers
tool height offset calculation is accurate to within 90%
apprentice uses a calculator correctly
apprentice calculates the tool height offset for a CNC machining center
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Evaluate expressions involving order of operations
Assessment Strategies
Machinist Math Worksheet
Criteria
the solution is arrived at according to order of operations
the solution numeric values are substituted for literals
the solution shows order of operations applied to expression
the solution is stated to the specified precision with 90% accuracy
the solution formula(s) selected match given situation
apprentice uses a calculator correctly
apprentice solves problems for a taper on a cylindrical part
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Perform basic geometric operations
Assessment Strategies
Machinist Math Worksheet
Criteria
the layout has parts of a circle diagrammed and marked
the layout calculations are within 90% accuracy
the layout is completed with geometric principle(s) selected to solve specific layout problems
the layout arc lengths are determined according to principles of proportion
the layout shows degrees, minutes, and seconds converted to decimal degrees and conversely
apprentice uses a calculator correctly
apprentice creates a layout on a sheet metal part
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Solve right triangle problems
Assessment Strategies
Machinist Math Worksheet
Criteria
apprentice identifies opposite, adjacent, hypotenuse relative to specified acute angle
apprentice explains how trigonometric formulas are applied to right triangle solutions
the chamfer size solution is stated to 100% accuracy
the chamfer size solution shows use of trigonometric functions to determine a given angle
apprentice uses a calculator correctly
apprentice determines the chamfer size on a part