By Jane Cook
The first step in complicated math is now the simplest.
Alpha train your self Algebra I in 24 Hours presents readers with a dependent, self-paced, straight-forward instructional to algebra. it is the excellent textbook spouse for college kids suffering from algebra, an outstanding primer for these seeking to get a head commence on an upcoming classification, and a welcome refresher for folks tasked with assisting out with homework, all in 24 one-hour classes.
• Algebra is the second-most well known mathematic direction for school- sure highschool scholars
• approximately all college-bound highschool scholars now take algebra
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Extra info for Alpha Teach Yourself Algebra I in 24 Hours
27. –25 · –5 = (–10) ÷ –2 ÷ (–1) = –24 ÷ –2 ÷ 3 · (–8) = Answers to Sample Problems in Hour 3 1. 2. 3. 4. 5. 6. 7. 8. 9. –13 –7 –10 –13 –6 –19 –4 –13 10 Real Numbers: Four Operations 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 5 1 –7 –10 2 –9 18 8 7 –3 –8 –16 18 30 –30 5 –5 –32 Based on what you’ve learned in Hour 3, solve the following about add ing, subtracting, multiplying, and dividing real numbers. Check your answers with the solution key in Appendix B. 1. –5 + –2 = 3 +7 –7 –3 a.
STRICTLY DEFINED To simplify means to write an algebraic expression in the fewest terms possible. ” The order of operations tells you to add the x and the 2 first because they are inside the parentheses, but they cannot be added together since one is a variable and one is a number. ” So the way to simplify 3(x + 2) is to write 3x + 6. This specific example points out an important fact of algebra: Expressions that include parentheses are not in simplest form if the parentheses can be removed using the distributive property.
Because the number line has smaller numbers on the left side and larger numbers on the right, you can compare plotted numbers to see which is greater than the other. Numbers can be ordered (compared to each other) with inequality symbols, such as greater than (>) or less than (<). Of course, if the numbers are equal, you use the = 13 14 Hour 2 symbol. Just as equal to is shown with the = symbol, greater than and less than have their own symbols. Symbols for Ordering Numbers Phrase Symbol “is greater than” “is less than” > < “is equal to” “is greater than or equal to” “is less than or equal to” = r b FYI If you have trouble remembering which symbol represents “greater than” and which represents “less than,” it may help to picture the “less than” sym bol < as an L, and “less than” starts with an L.