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Published byJasmin Hudson Modified over 9 years ago

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Key Vocabulary: Opposites – pairs of positive and negative integers whose sum equals 0 Additive inverses – numbers and their opposites 2.2 Adding and Subtracting Rational Numbers Students will add and subtract integers and rational numbers Designed by Skip Tyler, Edited by Diane Warren

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Find the sum. 1) -2.304 + (-0.26) Line up the decimals and add (same signs). -2.564 2) Get a common denominator and subtract.

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Find the difference. 3) Change subtraction to adding the opposite. Get a common denominator. Subtract and keep sign of the larger number.

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Find the difference. 4) Get a common denominator and subtract. Change subtraction to adding the opposite.

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Substitute for y: 6.32 - (-3.42) 6.32 + 3.42 9.74 5) Solve 6.32 – y if y = -3.42

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Find the solution 6.5 – 9.3 = ? Answer Now 1.-3.2 2.-2.8 3.2.8 4.3.2

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Find the solution Answer Now 1.. 2. 3. 4.

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A rational number is a number that can be written as a fraction. How can these be written as a fraction? 3 =

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Inequality Symbols

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Ordering Rational Numbers 2 ways to order from least to greatest 1.Get a common denominator 2.Change the fractions to decimals (numerator demoninator)

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Which rational number is bigger? 1) Get a common denominator. 2) or convert the fraction to a decimal. 0.363 < 0.375 4 11 < 3 8

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Which rational number is bigger? 1)Get a common denominator 2)or convert to a decimal 1.75 < 1.83 7 4 or 11 6 42 24 < 44 24

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Which symbol makes this true? 5 7 __ 3 4 1.< 2.> 3.= Answer Now

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Which symbol makes this true? -2 9 __ 4 1.< 2.> 3.= Answer Now

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