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Math Homework Worksheet (front & back) Individuals: Homework out, ready to check. Tuesday, March 3 rd
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Homework Review
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Pattern-Block Fractions Finish working on journal pgs. 195-196, from yesterday, with your shoulder partner. If you need additional help, ask the other teams at your table. Early Finishers: Complete Math Boxes pg. 197 Time: 10 minutes Level: 0-1
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Unit 7: Lesson 5 Target/Objective: I can add fractions with like and unlike denominators.
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Math Message If the hexagon pattern block is the whole, what fractions are represented by the trapezoid, the rhombus, and the triangle?? The trapezoid represents ½. The rhombus represents ⅓. The triangle represents ⅙. ½ + ⅓ + ⅙ = 1
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Adding Fractions There are 2 simple steps to add fractions: Step 1: Make sure the denominators are the same. Step 2: Add the numerators, put the answer over the denominator.
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Adding Fractions with Like Denominators ⅓ + ⅓ = ___ Are the denominators the same? Then add the numerators. What’s the answer? ⅔
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Adding Mixed Numbers with Like Denominators 1 ⅙ + 2 ⅙ + ⅙ + ⅙ + ⅙ = ___ Are the denominators the same? Add the fractions, then add the whole numbers. What’s the answer? 3 ⅚
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Notebook Practice : Adding with Like Denominators ⅓ + ⅔ = ⅛ + ⅜ = ⅗ + ⅕ = 2 ⅔ + 4 ⅓ = 5 ⅕ + 6 ⅗ = 11 ⅜ + 12 ⅜ =
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Adding Fractions with Unlike Denominators Step 1: The bottom numbers are different. See how the slices are different sizes? We need to make them the same before we can continue, because we can’t add them like that.
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We have to find the LCD Least Common Denominator
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Whatever you do to the bottom of the fraction, you must to do the top!!! LCD = 6 ⅙ already has a denominator of 6, so we’ll leave it alone. In order for ⅓ to have a like denominator, we have to multiply the fraction by 2.
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Let’s Practice using the LCD ⅔ + ⅙ = – Multiples of 3: 3, 6, 9, 12 – Multiples of 6: 6, 12, 18 3 x ___ = 6 Multiply ⅔ by 2: 2 2 4 3 6 = X 2
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4646 1616 5656 += Answer:
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Practice Unlike Denominators 1 5 4 8 + 4 1 9 3 + 2 1 3 12 + = = = 2 1 3 5 += Challenge:
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Wrap Up! Did we achieve our target/objective? – I can add fractions with like and unlike denominators. Individuals: Get ready to move classes!
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