Representing a product of two factors may depend on the methods student experienced. What representation of 37 × 5 below would indicate that the student had worked with base-ten?
A) An array with 5 × 30 and 5 × 7.
B) 5 groups of 30 lines and 5 groups of 7 dots.
C) 5 circles with 37 items in each.
D) 37 + 37 + 37 + 37 + 37 + 37 + 37.
Answer: B
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