By Jane Cook
The first step in complicated math is now the best.
Alpha educate your self Algebra I in 24 Hours offers readers with a dependent, self-paced, straight-forward educational to algebra. it is the ideal textbook significant other for college kids being affected by algebra, an effective primer for these seeking to get a head begin on an upcoming type, and a welcome refresher for fogeys tasked with supporting out with homework, all in 24 one-hour classes.
• Algebra is the second-most well known mathematic path for school- sure highschool scholars
• approximately all college-bound highschool scholars now take algebra
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Additional resources for Alpha Teach Yourself Algebra I in 24 Hours
This combination of like terms is a perfect example of the distributive property in reverse order, because the sum of 3x + 6x could have come from x(3 + 6). You know that 3 + 6 = 9, which leads to x · 9, which equals 9x because of the commutative property. JUST A MINUTE Recall the sign rules for + and ·. Adding positive numbers gives a positive number. Adding negative numbers gives a negative number. To add a posi tive to a negative number, remove their signs, subtract, and use the sign of the larger number for the sign of the answer.
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.
F. g. h. i. –4 + 7 = 3 3 + –8 = –5 –10 + 3 = –7 (–5) + (+ 6) = 1 2 + (–9) = –7 Now try the following problems, and check your answers on pages 30–31. ) 7. 8. 9. 10. –7 + 3 = (–5) + (–8) = 12 + (–2) = (–1) + 6 = To review what you’ve learned so far about adding real numbers: Adding all positive numbers gives a positive number. Adding all negative numbers gives a negative number. To add a positive to a negative number, remove their signs, subtract, and use the sign of the larger number for the sign of the answer.
Alpha Teach Yourself Algebra I in 24 Hours by Jane Cook