In this animated object, learners examine the major descending tracts of the nervous system. A matching exercise completes the activity.

In this animated activity, learners view the pathways and functions of the fasciculus gracilis and the fasciculus cuneatus.

In this animated object, learners trace the olfactory pathway from the nasal cavity to the olfactory cortex.

Students use the Base Minus One Complement method to perform binary subtraction. This learning activity has audio content and immediate feedback.

Learners read definitions of the terminology associated with algebraic operations and then follow steps to simplify algebraic expressions.

Students view the steps for subtracting complex numbers in Excel.

In this learning activity you'll solve three binary subtraction problems using the 2's complement method.

In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."

In this interactive object, learners follow step-by-step instructions for reducing algebraic fractions, which contain addition and/or subtraction, to their simplest form. This activity has audio content.

Learners solve two sample problems for an abstract reasoning assessment.

In this learning activity you'll arrange words from abstract or general language to specific language.

Learners follow step-by-step instructions for finding the lowest common denominator for a group of algebraic fractions and then enter their answers to three problems. Immediate feedback is provided. This activity has audio content.

In this highly interactive and animated object, learners follow a step-by-step process to reduce algebraic fractions, which contain no addition or subtraction, to their simplest, most elementary form. Immediate feedback is provided. This activity has audio content.

Learners follow the steps for adding and subtracting signed numbers and complete practice exercises.

Learners use the Base Minus One Complement method to do octal subtraction.

In this animated and interactive object, learners view two examples of how to subtract fractions with unlike denominators and then work five similar problems.

In this learning activity you'll perform subtraction calculations using borrowing with mixed number fractions.

In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.

Students use the Base Minus One Complement method to perform hexadecimal subtraction.