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Number Sense · Arithmetic

Dozen

Dozen describes a number, operation, pattern, or property used to reason about quantity and whole-number structure. In plain language, it gives a precise name to one u...

Number Sense · Arithmetic

Dual Number

Dual Number is a number-system idea used to classify values, recognize patterns, or carry out reliable computation. In plain language, it gives a precise name to one u...

Fractions, Ratios & Percentages

Duplicate Ratio

Duplicate Ratio names a way to express or analyze relative size rather than only absolute size. In plain language, it gives a precise name to one useful feature of fra...

Fractions, Ratios & Percentages

Dyadic Fraction

Dyadic Fraction is a proportional-reasoning idea for relating quantities that may use different units or scales. In plain language, it gives a precise name to one usef...

Algebra & Functions

Dynamic Programming

Dynamic Programming names a structure, relation, rule, or reasoning method used with finite or countable objects. In plain language, it gives a precise name to one use...

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