Series: Connecting Math to RealWorld Tasks
Math.4.NF.B.3a
 Common core State Standards
 Math: Math
 4: Grade 4
 NF: Number & OperationsFractions
 B: Build fractions from unit fractions

3a:
Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
b. Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
c. Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
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d. Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.
Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, 100.
Math.4.NF.B.3c
Common core State Standards
 Math: Math
 4: Grade 4
 NF: Number & OperationsFractions
 B: Build fractions from unit fractions

3c:
Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
a. Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.
b. Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
c. Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
<br />
d. Solve word problems involving addition and subtraction of fractions referring to the same whole and having like denominators, e.g., by using visual fraction models and equations to represent the problem.
Grade 4 expectations in this domain are limited to fractions with denominators 2, 3, 4, 5, 6, 8, 10, 12, 100.
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Thought starters
 What do students do before getting the task?
 How does Ms. Linares make sure students understand the problem?
 What do you notice about how Ms. Linares balances time for both individual and group work?
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School Details
Orange Grove Elementary School3525 West County 16 1/2 St
Somerton AZ 85350
Population: 357
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Teachers
Patty Linares
Newest
Teaching Practice
All Grades / All Subjects / Collaboration
Teaching Practice
All Grades / All Subjects / Engagement
Diane Gentle Feb 10, 2018 7:13pm
Stephanie Smith Jan 23, 2018 5:25pm
maisoun mando Jul 10, 2017 11:19am
Karen Iris Mar 1, 2017 9:56pm
Daniela Andrade Sep 20, 2016 6:52pm