Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
0. Review of Algebra
Exponents
1:23 minutes
Problem 35a
Textbook Question
Textbook QuestionFind each sum or difference. -2.8 + 4.5
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Addition of Real Numbers
Addition of real numbers involves combining two or more numbers to find their total. In this case, -2.8 and 4.5 are real numbers, and their sum can be calculated by aligning their values on a number line. The result reflects the net value after considering the positive and negative contributions.
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Negative and Positive Numbers
Understanding negative and positive numbers is crucial in arithmetic operations. Negative numbers represent values less than zero, while positive numbers are greater than zero. When adding a negative number to a positive number, the result is determined by the larger absolute value, which dictates whether the sum is positive or negative.
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Number Line Representation
A number line is a visual representation of numbers in order, which helps in understanding addition and subtraction. By plotting -2.8 and 4.5 on the number line, one can see how far each number is from zero and how they interact when added together. This visual aid can clarify the concept of combining values and the resulting position on the line.
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