Amy finds 32 × 54 as follows:
54 is 4 more than 50, so find 32 × 50 and add 4 back to get 1728.
A) Which is TRUE of Amy's mathematical steps?
i. Amy's steps are probably mathematically correct, although the phrasing is not perfect (should be "add four 32s back").
ii. Amy's steps are mathematically flawed.
iii. It cannot be determined whether Amy's steps are mathematically correct or flawed.
B) Which is TRUE of Amy's understanding of multiplication?
i. Amy doesn't appear to understand multiplication.
ii. Amy may or may not understand multiplication.
iii. Amy shows good understanding of multiplication.
Correct Answer:
Verified
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A)
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