Representing a product of two factors may depend on the methods student experienced. What representation of 37 x 5 below would indicate that the student had worked with base-ten?
a. An array with 5 x 30 and 5 x 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.
b
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Fill in the blank(s) with the appropriate word(s).