Florida B.E.S.T. MA.4.FR.2.4
The Standard
Extend previous understanding of multiplication to explore the multiplication of a fraction by a whole number or a whole number by a fraction.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students represent equal groups of fractional amounts with pictures, number lines, repeated addition, and equations. They find products and explain why the denominator names the same-sized parts.
What Mastery Looks Like
- Students can solve examples such as 4 × 2/3 using repeated addition, fraction strips, or a number line. They can write an equation, name the total, and explain what each factor represents.
Common Misconceptions
- Students may multiply both the numerator and denominator, claiming 3 × 2/5 = 6/15. They may also add the whole number to the numerator or count parts without naming the whole.
How to Assess It
- Give an exit ticket: “Show 4 × 2/3 with a model, write an equation, and explain why the denominator stays 3.”
Lesson moves
Ways to Teach It
Give pairs fraction strips to build three groups of 2/5, sketch the model, and write the matching multiplication equation.
Have students explain in writing how 3 × 2/5 and 2/5 × 3 can describe the same amount.
Students draw one whole-number card and one fraction card, find the product, and compare products with a partner for a point.
Present a recipe using 3/4 cup of oats per batch, then ask students to model and calculate the amount for four batches.
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Printable MA.4.FR.2.4 Worksheet
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Related Standards
- MA.6.NSO.2.2
Extend previous understanding of multiplication and division to compute products and quotients of positive fractions by positive fractions, including mixed numb...
- MA.5.FR.2.2
Extend previous understanding of multiplication to multiply a fraction by a fraction, including mixed numbers and fractions greater than 1, with procedural reli...
- MA.5.FR.2.4
Extend previous understanding of division to explore the division of a unit fraction by a whole number and a whole number by a unit fraction.
- MA.4.AR.1.3
Solve real-world problems involving multiplication of a fraction by a whole number or a whole number by a fraction.
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