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Fourth Grade | Numbers and Operations: Adding and Subtracting Fractions
Standard: CC.2.1.4.C.2; M04.A-F.2.1.2; M04.A-F.2.1.3; M04.A-F.2.1.4
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers
Decompose a mixed number into a sum of fractions with the same denominator (denominators limited to 2, 3, 4, 5, 6, 8, 10, 12, and 100), recording the decomposition by an equation. Justify decompositions (e.g., by using a visual fraction model).
Add and subtract mixed numbers with a common denominator (denominators limited to 2, 3, 4, 5, 6, 8, 10, 12, and 100; no regrouping with subtraction; fractions do not need to be simplified; and no improper fractions as the final answers).
Solve word problems involving addition and subtraction of fractions referring to the same whole or set and having like denominators (denominators limited to 2, 3, 4, 5, 6, 8, 10, 12, and 100).
I can...
decompose a fraction or a mixed number into a sum of fractions with the same denominator recording the decomposition by an equation.
justify decompositions by using a visual fraction model.
add mixed numbers with a common denominator.
subtract mixed numbers with a common denominator no regrouping.
solve word problems involving addition and subtraction of fractions referring to the same whole or set and having like denominators.
LEARNING SCALE
With help, the student demonstrates partial success at 2.0 and 3.0.
I will perform basic processes, such as:
explain algorithms for adding or subtracting mixed numbers.
explain strategies for solving word problems involving fractions.
explain how to decompose mixed numbers.
I can recognize or recall specific vocabulary, such as:
visual fraction model, denominator, decomposition.
I can:
Decompose a mixed numbers into a sum of fractions with the same denominator recording the decomposition by an equation.
Justify decompositions by using a visual fraction model.
Add mixed numbers with a common denominator.
Subtract mixed numbers with a common denominator no regrouping.
Solve word problems involving addition and subtraction of fractions referring to the same whole or set and having like denominators.
SUPPORTING RESOURCES
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