Practice Problems — Set 18

5.NF.A.2 · Solve word problems involving addition and subtraction of fractions r…

Print and write your answers. Use diagrams to show thinking.

Warm-up

1. Talk through today's focus: Solve word problems involving addition and subtraction of fractions r… 2. Try one oral example together before writing. 3. Use the diagram to explain your thinking.

_See printable PDF for diagram._

Written practice

1. 1/4 + 1/4 = ___ 2. 3/4 − 1/4 = ___ 3. 2/5 + 1/5 = ___ 4. Draw a model for 1/3 + 1/3 5. Story: 1/2 mile + 1/4 mile. Total? ___ 6. Explain why denominators stay the same when adding like fractions. 7. Explain your thinking for set 18 in one sentence. 8. Create your own problem for 5.NF.A.2.

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More written practice

1. Apply Solve word problems involving addition and subtraction of fractions r… (item 9, set 18): show your work. ___ 2. Apply Solve word problems involving addition and subtraction of fractions r… (item 10, set 18): show your work. ___ 3. Apply Solve word problems involving addition and subtraction of fractions r… (item 11, set 18): show your work. ___ 4. Apply Solve word problems involving addition and subtraction of fractions r… (item 12, set 18): show your work. ___ 5. Apply Solve word problems involving addition and subtraction of fractions r… (item 13, set 18): show your work. ___ 6. Apply Solve word problems involving addition and subtraction of fractions r… (item 14, set 18): show your work. ___

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Patterns and rules

1. Denominator = equal parts; numerator = parts counted. 2. Same denominator means same-sized pieces. 3. Draw the model before adding numerators.

_See printable PDF for diagram._

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Stretch

1. Create your own 5.NF.A.2 question for a parent to solve. 2. Explain your method in two sentences.

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Parent tip: Draw models before adding numerators