(Premium Prep) Cisco 500-443 Real Exam Questions - Boost Your Success

Basic Subtraction

• Basic subtraction involves finding the difference between two numbers.
• It is a fundamental arithmetic operation.
• Subtraction is the inverse operation of addition.
• Understanding place value is crucial for accurate subtraction.
• Subtraction with borrowing is necessary when the top digit in a column is smaller than the bottom digit.
• Subtraction with regrouping involves borrowing from the next higher place value.

Number Properties

• Commutative property does not apply to subtraction (e.g., 5 - 3 ≠ 3 - 5).
• Associative property does not apply to subtraction (e.g., (10 - 5) - 2 ≠ 10 - (5 - 2)).
• Subtraction of a number from itself always results in zero (e.g., 8 - 8 = 0).
• Subtracting zero from a number results in the same number (e.g., 12 - 0 = 12).
• Subtraction of a number from a smaller number gives a negative result.

Real-life Applications

• Calculating change in shopping situations.
• Determining the difference in distance between two locations.
• Finding the remaining amount of time available.
• Calculating cost savings after discounts are applied.
• Determining the amount of work left to be completed.
• Balancing budgets and tracking finances.

Word Problems

• Word problems are real-world situations that require the application of subtraction to find a solution.
• Read the problem carefully and identify the relevant information.
• Determine the required operation (in this case, subtraction).
• Solve the equation to find the answer.
• Check that the answer makes sense in the context of the problem.

Mental Math Strategies

• Counting up: Start with the smaller number and count up to the larger number, noting each step.
• Using compensation: Adjust one number strategically to make the subtraction easier.
• Breaking down numbers: Split each number into smaller parts and subtract sequentially.
• Using number lines: Visual representation of numbers that can support easier subtraction.
• Properties of numbers: Employ properties like additive identity to simplify the problem.
• Fact families: Utilize relationships between addition and subtraction to derive answers faster.