Mathematics Flashcards

Which instructional strategy is most effective when teaching place value to elementary students?

Answer: Using base-ten blocks to model hundreds, tens, and ones

Concrete manipulatives like base-ten blocks allow students to physically build and see the structure of place value.

What is the sum of the interior angles of a pentagon?

Answer: 540°

The sum of interior angles of any polygon is (n-2)×180°, so for a pentagon: (5-2)×180° = 540°.

A data set has values: 4, 8, 6, 5, 3, 8, 9. What is the mode?

Answer: 8

The mode is the value that appears most frequently; 8 appears twice while all others appear once.

Which of the following represents a proportional relationship?

Answer: y = 4x

A proportional relationship has the form y = kx (passing through the origin), so y = 4x is proportional.

A teacher is planning a lesson on fractions. Which sequence reflects the correct concrete-to-abstract progression?

Answer: Manipulatives → pictorial models → symbolic notation

The CRA framework moves from concrete manipulatives, to pictorial representations, to abstract symbolic notation.

What is the probability of rolling a 3 or a 5 on a fair six-sided die?

Answer: 1/3

There are 2 favorable outcomes (3 and 5) out of 6 total, so the probability is 2/6 = 1/3.