What Statement Is True About Adding and Subtracting with Unlike

question 18

Multiple Choice

What statement is true about adding and subtracting with unlike denominators?

• A)Should be introduced at first with tasks that require both fractions to be changed.
• B)Is sometimes possible for students,especially if they have a good conceptual understanding of the relationships between certain fractional parts and a visual tool,such as a number line.
• C)Is a concept understood especially well by students if the teacher compares different denominators to "apples and oranges."
• D)Should initially be introduced without a model or drawing.

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