Add and subtract fractions within 1 with the same units.
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Since it is possible to overemphasize the importance of simplifying fractions, the corresponding criteria for success and questions in the Anchor Tasks are optional. If you want the focus for today to solely be on adding and subtracting fractions within 1, you may decide to cut this aspect of the lesson, but be sure to touch on the idea at some point in the unit.
If you need to adapt or shorten this lesson for remote learning, we suggest prioritizing Anchor Tasks 2-4 (benefit from worked examples). You could consolidate these as one Anchor Task using Anchor Task 2 Part (a), Anchor Task 3 Part (b), and all of Anchor Task 4. Find more guidance on adapting our math curriculum for remote learning here.
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Grade 4 Mathematics > Module 5 > Topic D > Lesson 16 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by The Match Foundation, Inc.First, estimate the following sums. Then add.
a. $${{2\over8}+{3\over8}}$$
b. $${{1\over6}+{3\over6}}$$
First, estimate the following differences. Then subtract.
a. $${{4\over5}-{1\over5}}$$
b. $${{7\over12}-{3\over12}}$$
First, estimate the following solutions. Then add or subtract.
a. $${{3\over4}+{1\over4}}$$
b. $${1-{3\over10}}$$
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Solve.
1. $${{7\over8}-{4\over8}}$$
2. $${{5\over10}+{3\over10}}$$
3. $${1-{2\over5}}$$
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