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Published byBaby Hedges Modified over 2 years ago

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Day 4 Name all the sets of numbers to which each number belongs to: R = real, Q = rational, I = irrational, Z = integers, N = natural, W = whole. 1.2.3.4. Compare using or =. 5. 6.7. Write an algebraic expression and define the variable: 8. Six less than four times a number.

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2.1/2.2 Adding/Subtracting Rational #’s Don’t forget to write this “I Can” in your target sheet. (Bold words above are to signal those words were listed as an objective on the pre-test) I can simplify numerical expressions using order of operations.

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Additive inverse - The opposite of a #. 2.1/2.2 Adding/Subtracting Rational #’s

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Identity Property of Addition - For every rational number n, n+0=n. Inverse Property of Addition - For every rational number n, there is an additive inverse –n such that n + (-n)=0.

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RULES To add numbers with the same sign, add their absolute values. The sum has the same sign as the addends (#s being added). To add numbers with different signs, find the difference of their absolute values. The sum has the same sign as the addend with the greater absolute value.

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Adding using a number line model

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To subtract a number, always do Bigger absolute value # - Smaller absolute value # Remember the bigger absolute value gets the sign.

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Simplifying Absolute Values Always simplify what’s inside first before taking the absolute value 8 9 1 - 9 - 16

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